Updated 3 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,764exploited flaws on CISA’s list

35added in the last 30 days

457new WordPress flaws this week

390,714entries in the database

162 results · page 1 of 4

Oct 28, 2026Appointment Booking Calendar: Stored Cross-Site ScriptingCVE-2026-111727 · WordPress plugins & themes · reported by WordfenceMedium 6.4
The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vs_text_submitbtn' parameter in all versions up to, and including, 1.4.05 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to be assigned as a calendar owner, a per-user grant that any administrator can extend to users as low as Subscriber level through the plugin's calendar list screen. Exploitation by attackers with subscriber-level access and above requires that an administrator has assigned the attacker's account as owner (`conwer`) of a calendar via the plugin's calendar list screen; the plugin's UI lists all registered users regardless of role, so a Subscriber can be assigned. On a default installation, where that is not configured, the vulnerability requires attackers with editor-level access and above.
Product
Appointment Booking Calendar
Affected
up to 1.4.05
What to do
Affects up to 1.4.05. Update Appointment Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 17, 2026WP Booking System – Booking Calendar: Authorization bypassCVE-2026-109369 · WordPress plugins & themes · reported by WordfenceMedium 6.8
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin's own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to 'read' (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id.
Product
WP Booking System – Booking Calendar
Affected
up to 2.1.0.3
What to do
Affects up to 2.1.0.3. Update WP Booking System – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 17, 2026WP Booking System – Booking Calendar: Sensitive Information ExposureCVE-2026-109368 · WordPress plugins & themes · reported by WordfenceMedium 6.5
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.1.0.3 via the 'id' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract private per-event booking descriptions and booking IDs from any calendar managed by the site.
Product
WP Booking System – Booking Calendar
Affected
up to 2.1.0.3
What to do
Affects up to 2.1.0.3. Update WP Booking System – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 17, 2026WP Booking System – Booking Calendar: Authorization bypassCVE-2026-108123 · WordPress plugins & themes · reported by WordfenceHigh 7.5
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to read the stored notification email body of any booking by iterating booking_id and email_log_id, exposing customer PII including names, email addresses, phone numbers, messages, and booking dates intended to be visible only to administrators. This is exploitable by any Subscriber-level user because admin_init fires on profile.php, a wp-admin page accessible to all authenticated users.
Product
WP Booking System – Booking Calendar
Affected
up to 2.1.0.3
What to do
Affects up to 2.1.0.3. Update WP Booking System – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 16, 2026WP Booking System – Booking Calendar: Generic SQL InjectionCVE-2026-111178 · WordPress plugins & themes · reported by WordfenceMedium 4.9
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to generic SQL Injection via the 'data[orderby]' parameter in all versions up to, and including, 2.1.0.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Exploitation requires the targeted calendar to have more than 200 bookings, as the orderby value is only forwarded to the database layer when the AJAX handler takes the use_ajax branch; an Administrator can satisfy this condition by creating bookings directly.
Product
WP Booking System – Booking Calendar
Affected
up to 2.1.0.1
What to do
Affects up to 2.1.0.1. Update WP Booking System – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 10, 2026WP Booking System – Booking Calendar: Time-based SQL InjectionCVE-2026-107712 · WordPress plugins & themes · reported by WordfenceMedium 6.5
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to time-based SQL Injection via the 'current_month' parameter in all versions up to, and including, 2.1.0.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is a regression vulnerability — a capability check introduced in versions 2.0.19.11–2.0.19.14 to address CVE-2024-50425 was removed in version 2.1, meaning any authenticated subscriber-level account can reach the vulnerable handler with no nonce validation required.
Product
WP Booking System – Booking Calendar
Affected
up to 2.1.0.1
What to do
Affects up to 2.1.0.1. Update WP Booking System – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 10, 2026Booking Calendar: Sensitive Information ExposureCVE-2026-18496 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 11.4.3 via the wpbc_is_show_popover_in_flex_timeline() function. This makes it possible for unauthenticated attackers to extract sensitive data including names, email addresses, and phone numbers of customers who have made bookings.
Product
Booking Calendar
Affected
up to 11.4.3
What to do
Affects up to 11.4.3. Update Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org wordfence.com
Oct 10, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: Incorrect AuthorizationCVE-2026-6723 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 1.6.11.11. This is due to the appointment update REST API endpoint not restricting which fields can be modified by token-authenticated customers. This makes it possible for unauthenticated attackers to modify admin-controlled fields on that appointment, including faking payment confirmation, reassigning the appointment to another user, and changing the service type.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.11.11
What to do
Affects up to 1.6.11.11. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org wordfence.com
Oct 8, 2026Booking Calendar: Does not adequately restrictCVE-2026-105195 · WordPress plugins & themes · reported by WPScanLow 2.7
The Booking Calendar WordPress plugin before 11.8.3 does not adequately restrict which options a lower-privileged user can load through one of its settings handlers, allowing users with the Editor role and above to disclose the values of arbitrary WordPress options, including core site configuration.
Product
Booking Calendar
Fixed in
11.8.3
What to do
Update Booking Calendar to 11.8.3 or newer.
Full record and what to do →NVD record wpscan.com
Oct 8, 2026Booking Calendar: Does not generate its per-booking access hashes with sufficient entropyCVE-2026-105193 · WordPress plugins & themes · reported by WPScanMedium 4.8
The Booking Calendar WordPress plugin before 11.8 does not generate its per-booking access hashes with sufficient entropy, deriving each from a low-entropy time-seeded value, which can allow unauthenticated attackers who are able to determine a booking's creation time to predict the hash and then read that booking's personal data or modify the booking in place.
Product
Booking Calendar
Fixed in
11.8
What to do
Update Booking Calendar to 11.8 or newer.
Full record and what to do →NVD record wpscan.com
Oct 6, 2026Unauthenticated SQL Injection in Radius Booking — Booking Calendar for Appointments & Services <= 1.0.19 versions.CVE-2026-39764 · WordPress plugins & themes · reported by PatchstackCritical 9.3
Unauthenticated SQL Injection in Radius Booking — Booking Calendar for Appointments & Services <= 1.0.19 versions.
Affected
up to 1.0.19
What to do
Affects up to 1.0.19. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Oct 3, 2026VikAppointments Services Booking Calendar: Arbitrary file deletionCVE-2026-87115 · WordPress plugins & themes · reported by WordfenceCritical 9.1
The VikAppointments Services Booking Calendar plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the extract function in all versions up to, and including, 1.2.21. This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires at least one File-type custom field to be published on the confirmation page shortcode, as this field is not created by default during plugin installation.
Product
VikAppointments Services Booking Calendar
Affected
up to 1.2.21
What to do
Affects up to 1.2.21. Update VikAppointments Services Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Oct 2, 2026Booking Calendar: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVE-2026-39601 · WordPress plugins & themes · reported by PatchstackLow 3.7
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows Leveraging Race Conditions.This issue affects Booking Calendar: from n/a through 11.8.4.
Product
Booking Calendar
Affected
up to 11.8.4
What to do
Affects up to 11.8.4. Update Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Oct 1, 2026Appointment Hour Booking – Booking Calendar: Stored DOM-Based Cross-Site ScriptingCVE-2026-96573 · WordPress plugins & themes · reported by WordfenceHigh 7.2
The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via Booking Form Single-Line Field via Schedule Calendar List Renderer in all versions up to, and including, 1.5.97 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the 'list_readmore_numberofwords' Other Parameters setting to be configured with a positive integer value; the default value of 0 bypasses the decode-and-truncate branch entirely and is not exploitable through this sink.
Product
Appointment Hour Booking – Booking Calendar
Affected
up to 1.5.97
What to do
Affects up to 1.5.97. Update Appointment Hour Booking – Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Sep 22, 2026Booking Calendar: Reflected Cross-Site ScriptingCVE-2026-93655 · WordPress plugins & themes · reported by WordfenceMedium 6.1
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Product
Booking Calendar
Affected
up to 11.8.3
What to do
Affects up to 11.8.3. Update Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Sep 19, 2026Hydra Booking — Appointment Scheduling & Booking Calendar: Does not perform object-level authorisation checks on several of its host-management operationsCVE-2026-92425 · WordPress plugins & themes · reported by WPScanMedium 5.5
The Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.4 does not perform object-level authorisation checks on several of its host-management operations, allowing users who hold its own administrator-assigned custom role to read, modify and permanently delete other hosts' records and the WordPress user accounts linked to them.
Product
Hydra Booking — Appointment Scheduling & Booking Calendar
Fixed in
1.2.4
What to do
Update Hydra Booking — Appointment Scheduling & Booking Calendar to 1.2.4 or newer.
Full record and what to do →NVD record wpscan.com
Sep 19, 2026Hydra Booking — Appointment Scheduling & Booking Calendar: Does not verify that the host record being modified belongs to the user making the requestCVE-2026-92421 · WordPress plugins & themes · reported by WPScanMedium 4.7
The Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.3 does not verify that the host record being modified belongs to the user making the request, allowing authenticated users holding a Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.3-assigned host role to modify other hosts' profile data and reassign ownership of another host's record to themselves.
Product
Hydra Booking — Appointment Scheduling & Booking Calendar
Fixed in
1.2.3
What to do
Update Hydra Booking — Appointment Scheduling & Booking Calendar to 1.2.3 or newer.
Full record and what to do →NVD record wpscan.com
Sep 19, 2026Hydra Booking — Appointment Scheduling & Booking Calendar: Does not verify that a booking belongs to the requesting user before modifying or deleting it on two of its booking endpointsCVE-2026-92420 · WordPress plugins & themes · reported by WPScanLow 3.8
The Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin before 1.2.2 does not verify that a booking belongs to the requesting user before modifying or deleting it on two of its booking endpoints, allowing a booking-provider-level user to cancel and permanently delete other providers' bookings on the same site.
Product
Hydra Booking — Appointment Scheduling & Booking Calendar
Fixed in
1.2.2
What to do
Update Hydra Booking — Appointment Scheduling & Booking Calendar to 1.2.2 or newer.
Full record and what to do →NVD record wpscan.com
Sep 18, 2026Booking Calendar: Privilege EscalationCVE-2026-92619 · WordPress plugins & themes · reported by WordfenceHigh 7.2
The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 11.8.2 via the `wpbc_ajax_option_save` AJAX action. The vulnerability exists because the `handle_ajax_save()` function applies per-option safeguards only to names explicitly registered via `register_option_policy()`, causing `get_option_policy()` to return an empty policy — bypassing all can_save, force_mode, and allowed_keys checks — for any unregistered option name, including core WordPress options, while an attacker-controlled `data_name` parameter passes through `sanitize_key()` and is written directly to `update_option()` without restriction. This makes it possible for authenticated attackers with Editor-level access and above to escalate their privileges to Administrator by writing core WordPress options such as `default_role=administrator` and `users_can_register=1`, then self-registering a new Administrator account. The nonce check does not meaningfully restrict this attack, as both the nonce value and nonce action are attacker-supplied POST parameters, and a valid nonce is trivially obtainable via `admin-ajax.php?action=rest-nonce`.
Product
Booking Calendar
Affected
up to 11.8.2
What to do
Affects up to 11.8.2. Update Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Sep 18, 2026Booking Calendar: Reflected Cross-Site ScriptingCVE-2026-92561 · WordPress plugins & themes · reported by WordfenceMedium 6.1
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'options' parameter in all versions up to, and including, 11.8.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The nonce check is bypassed by default because the 'booking_is_nonce_at_front_end' option ships disabled, allowing unauthenticated requests to reach the vulnerable sink without any verification.
Product
Booking Calendar
Affected
up to 11.8.2
What to do
Affects up to 11.8.2. Update Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Sep 17, 2026Unauthenticated Broken Access Control in Booking Calendar <= 11.7 versions.CVE-2026-74002 · WordPress plugins & themes · reported by PatchstackMedium 5.3
Unauthenticated Broken Access Control in Booking Calendar <= 11.7 versions.
Affected
up to 11.7
What to do
Affects up to 11.7. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Sep 11, 2026Booktics – Booking Calendar for Appointments and Service Businesses: Unauthorized modification of dataCVE-2026-11446 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Booktics – Booking Calendar for Appointments and Service Businesses plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 1.0.23. This is due to the create_order_permission() permission callback on the POST /wp-json/booktics/v1/orders REST route unconditionally returning true, combined with find_and_update_guest() overwriting an existing customer record's stored name, phone, and wp_user_id whenever the caller-supplied email matches, with no proof of ownership. This makes it possible for unauthenticated attackers to overwrite the contact details (name and phone) of any existing customer whose email address they know, poisoning downstream reminder emails, SMS, calendar invites, and CRM data.
Product
Booktics – Booking Calendar for Appointments and Service Businesses
Affected
up to 1.0.23
What to do
Affects up to 1.0.23. Update Booktics – Booking Calendar for Appointments and Service Businesses to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Sep 3, 2026Unauthenticated SQL Injection in VikAppointments Services Booking Calendar <= 1.2.20 versions.CVE-2026-84768 · WordPress plugins & themes · reported by PatchstackCritical 9.3
Unauthenticated SQL Injection in VikAppointments Services Booking Calendar <= 1.2.20 versions.
Affected
up to 1.2.20
What to do
Affects up to 1.2.20. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Aug 29, 2026Appointment Booking Calendar Plugin and Scheduling: Does not verify the amount actually paid against the server-side price staged for a bookingCVE-2026-76586 · WordPress plugins & themes · reported by WPScanHigh 7.5
The Appointment Booking Calendar Plugin and Scheduling Plugin WordPress plugin before 1.6.3 does not verify the amount actually paid against the server-side price staged for a booking when confirming an online payment, allowing unauthenticated users to have a paid appointment approved for a fraction of its price.
Product
Appointment Booking Calendar Plugin and Scheduling
Fixed in
1.6.3
What to do
Update Appointment Booking Calendar Plugin and Scheduling to 1.6.3 or newer.
Full record and what to do →NVD record wpscan.com
Aug 19, 2026Booking calendar, Appointment Booking System: Does not properly sanitize uploaded SVG filesCVE-2026-14334 · WordPress plugins & themes · reported by WPScanHigh 8.8
The Booking calendar, Appointment Booking System WordPress plugin through 3.2.36 does not properly sanitize uploaded SVG files, allowing unauthenticated attackers to upload a file that bypasses the Booking calendar, Appointment Booking System WordPress plugin through 3.2.36's script-stripping and executes arbitrary JavaScript when the SVG is opened, including in the session of an administrator who reviews the submitted booking.
Product
Booking calendar, Appointment Booking System
Affected
up to 3.2.36
What to do
Affects up to 3.2.36. Update Booking calendar, Appointment Booking System to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record wpscan.com
Aug 18, 2026Unauthenticated Insecure Direct Object References (IDOR) in Booking calendar, Appointment Booking System <= 3.2.36 versions.CVE-2026-73395 · WordPress plugins & themes · reported by PatchstackMedium 6.5
Unauthenticated Insecure Direct Object References (IDOR) in Booking calendar, Appointment Booking System <= 3.2.36 versions.
Affected
up to 3.2.36
What to do
Affects up to 3.2.36. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Aug 16, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: Insecure Direct Object ReferenceCVE-2026-13358 · WordPress plugins & themes · reported by WordfenceMedium 6.5
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.12.10 via the ssa_past_appointments due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to access appointment records belonging to arbitrary users and harvest the per-appointment ownership tokens (32-character hashes) embedded in the rendered HTML, which can then be used without any authentication to read or modify those appointments including full customer PII such as name, email, phone number, and private notes. The /wp-json/ssa/v1/render-shortcode REST endpoint is registered unconditionally on rest_api_init regardless of whether the Divi theme is installed, and its permission callback only requires current_user_can('edit_posts'), meaning any Contributor-level account is sufficient to trigger this entire exploit chain.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.12.10
What to do
Affects up to 1.6.12.10. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Aug 15, 2026Hydra Booking — Appointment Scheduling & Booking Calendar: Stored Cross-Site ScriptingCVE-2026-15948 · WordPress plugins & themes · reported by WordfenceMedium 6.4
The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'first_name' parameter in all versions up to, and including, 1.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with host-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The tfhb_host role required to exploit this vulnerability can be self-assigned by any visitor via the plugin's public Signup shortcode, making this effectively exploitable by unauthenticated users who complete the registration flow.
Product
Hydra Booking — Appointment Scheduling & Booking Calendar
Affected
up to 1.2.2
What to do
Affects up to 1.2.2. Update Hydra Booking — Appointment Scheduling & Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Aug 14, 2026Booking calendar, Appointment Booking System: Authorization bypassCVE-2026-8840 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.2.36. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to mark arbitrary reservations as paid or completed, cancel legitimate payments, auto-approve reservations, and trigger transactional booking emails by writing attacker-supplied payment status and transaction data directly into the payments table. The auto-approval of reservations is only triggered when the 'enable_psuccess_approval' site option is enabled, but payment status manipulation and email dispatch are exploitable regardless of that setting.
Product
Booking calendar, Appointment Booking System
Affected
up to 3.2.36
What to do
Affects up to 3.2.36. Update Booking calendar, Appointment Booking System to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Aug 5, 2026VikAppointments Service Booking Calendar wordpress plugin is vulnerable to unauthenticated SQL injection due to one of the parameters that controls how the publCVE-2026-15918 · WordPress plugins & themes · reported by WordfenceHigh 7.5
VikAppointments Service Booking Calendar wordpress plugin is vulnerable to unauthenticated SQL injection due to one of the parameters that controls how the public reviews list is sorted is taken from the incoming request and used to build a database query without proper validation or sanitization. Because this value is placed directly into the query, an attacker who is not logged in can inject arbitrary SQL through a normal booking page and read data from the site's database — including sensitive information such as WordPress user credentials. No authentication or special privileges are required
What to do
Update the plugin to the newest version.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jul 27, 2026Unauthenticated Cross Site Scripting (XSS) in Booking Calendar <= 11.4.2 versions.CVE-2026-59558 · WordPress plugins & themes · reported by PatchstackHigh 7.1
Unauthenticated Cross Site Scripting (XSS) in Booking Calendar <= 11.4.2 versions.
Affected
up to 11.4.2
What to do
Affects up to 11.4.2. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Jul 23, 2026Booking Agent Broken Access Control in QuickCal - Appointment Booking Calendar for WordPress <= 1.0.16 versions.CVE-2026-27377 · WordPress plugins & themes · reported by PatchstackMedium 6.7
Booking Agent Broken Access Control in QuickCal - Appointment Booking Calendar for WordPress <= 1.0.16 versions.
Affected
up to 1.0.16
What to do
Affects up to 1.0.16. Update the plugin to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Jul 13, 2026Booking calendar, Appointment Booking System: Missing AuthorizationCVE-2026-57778 · WordPress plugins & themes · reported by PatchstackMedium 5.3
Missing Authorization vulnerability in wpdevart Booking calendar, Appointment Booking System booking-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Booking calendar, Appointment Booking System: from n/a through <= 3.2.36.
Product
Booking calendar, Appointment Booking System
Affected
up to 3.2.36
What to do
Affects up to 3.2.36. Update Booking calendar, Appointment Booking System to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Jul 10, 2026Booking calendar, Appointment Booking System: Time-based SQL InjectionCVE-2026-15289 · WordPress plugins & themes · reported by WordfenceMedium 5.9
The Booking calendar, Appointment Booking System plugin for WordPress is vulnerable to time-based SQL Injection via the ‘wpdevart_id’ parameter in all versions up to, and including, 3.2.17 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. In order to exploit the vulnerability, the Pro version of the plugin must be installed and activated, with the 'Delete previous dates' option checked.
Product
Booking calendar, Appointment Booking System
Affected
up to 3.2.17
What to do
Affects up to 3.2.17. Update Booking calendar, Appointment Booking System to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jul 9, 2026Hydra Booking – Appointment Scheduling & Booking Calendar: Insecure Direct Object ReferenceCVE-2026-12433 · WordPress plugins & themes · reported by WordfenceMedium 4.3
The Hydra Booking – Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 1.2.1 via the /wp-json/hydra-booking/v1/booking/details/{id} REST endpoint. This is due to the getBookingDetails() callback only enforcing the tfhb_manage_options capability via tfhb_manage_options_permission(), without verifying that the requested booking belongs to the currently authenticated host (the lookup in getBookingDetailsData() filters solely on the booking id supplied in the URL). This makes it possible for authenticated attackers, with Hydra Host-level access and above (a role created by the plugin which grants tfhb_manage_options), to view sensitive booking records belonging to other hosts, including attendee names, emails, phone numbers, addresses, meeting details, payment method and status, transaction history, and internal notes by iterating booking IDs.
Product
Hydra Booking – Appointment Scheduling & Booking Calendar
Affected
up to 1.2.1
What to do
Affects up to 1.2.1. Update Hydra Booking – Appointment Scheduling & Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jul 8, 2026Appointment Booking Calendar Plugin and Scheduling: Does not validate data before passing it to a PHP deserialization functionCVE-2026-12378 · WordPress plugins & themes · reported by WPScanHigh 8.1
The Appointment Booking Calendar Plugin and Scheduling Plugin WordPress plugin through 1.1.28 does not validate data before passing it to a PHP deserialization function, allowing unauthenticated attackers to inject arbitrary PHP objects; where a suitable gadget chain is present on the site this can be leveraged to achieve remote code execution.
Product
Appointment Booking Calendar Plugin and Scheduling
Affected
up to 1.1.28
What to do
Affects up to 1.1.28. Update Appointment Booking Calendar Plugin and Scheduling to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record wpscan.com
Jul 1, 2026Appointment Booking Calendar: Sensitive Information ExposureCVE-2026-12113 · WordPress plugins & themes · reported by WordfenceMedium 4.3
The Appointment Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.4.02 via the cpabc_appointments_filter_list. This makes it possible for authenticated attackers, with contributor-level access and above, to extract customer names, email addresses, phone numbers, appointment comments, and other booking personally identifiable information.
Product
Appointment Booking Calendar
Affected
up to 1.4.02
What to do
Affects up to 1.4.02. Update Appointment Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jun 19, 2026Appointment Booking Calendar: Stored Cross-Site ScriptingCVE-2026-1856 · WordPress plugins & themes · reported by WordfenceMedium 6.4
The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom booking field labels in all versions up to, and including, 1.4.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Product
Appointment Booking Calendar
Affected
up to 1.4.4
What to do
Affects up to 1.4.4. Update Appointment Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jun 18, 2026Appointment Booking Calendar: Sensitive Information ExposureCVE-2026-12111 · WordPress plugins & themes · reported by WordfenceMedium 4.3
The Appointment Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 1.4.01. This is due to insufficient authorization and missing per-calendar ownership checks in the cpabc_appointments_calendar_load2() function, which is reachable via the cpabc_calendar_load2=1 query parameter in wp-admin and only checks is_admin() && current_user_can('edit_posts'), a capability available to Contributor-level users and above. This makes it possible for authenticated attackers with Contributor-level access and above to supply an arbitrary calendar ID via the id parameter and extract customer booking information, including email addresses, names, phone numbers, booking times, and comments, from any calendar managed by the plugin.
Product
Appointment Booking Calendar
Affected
up to 1.4.01
What to do
Affects up to 1.4.01. Update Appointment Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Jun 15, 2026WordPress Booking Calendar Contact Form 1.0.23 contains privilege escalation and stored cross-site scripting vulnerabilities that allow authenticated users to mCVE-2016-20070 · WordPress plugins & themes · reported by VulnCheckMedium 5.1
WordPress Booking Calendar Contact Form 1.0.23 contains privilege escalation and stored cross-site scripting vulnerabilities that allow authenticated users to modify plugin options and inject malicious scripts by failing to verify user privileges and sanitize input parameters. Attackers with subscriber-level accounts can inject XSS payloads through parameters like price, name, calendar_language, and email_confirmation_to_user via admin-ajax.php and admin.php endpoints to execute arbitrary JavaScript in administrator browsers.
What to do
Update the plugin to the newest version.
Full record and what to do →NVD record wordpress.dwbooster.com exploit-db.com
Jun 15, 2026the shortcode function that fails to sanitize the calendar parameter before using it in database queries: WordPress Booking Calendar Contact Form 1.0.23 contains an unauthenticated blind SQL injectionCVE-2016-20069 · WordPress plugins & themes · reported by VulnCheckHigh 8.8
WordPress Booking Calendar Contact Form 1.0.23 contains an unauthenticated blind SQL injection vulnerability in the shortcode function that fails to sanitize the calendar parameter before using it in database queries. Attackers can inject SQL commands through the calendar shortcode parameter to execute arbitrary SQL queries and extract sensitive database information.
Product
the shortcode function that fails to sanitize the calendar parameter before using it in database queries
What to do
Update the shortcode function that fails to sanitize the calendar parameter before using it in database queries to the newest version.
Full record and what to do →NVD record wordpress.dwbooster.com exploit-db.com
Jun 15, 2026WordPress Booking Calendar Contact Form version 1.0.23 contains an unauthenticated blind SQL injection vulnerability that allows remote attackers to execute arbCVE-2016-20068 · WordPress plugins & themes · reported by VulnCheckHigh 8.8
WordPress Booking Calendar Contact Form version 1.0.23 contains an unauthenticated blind SQL injection vulnerability that allows remote attackers to execute arbitrary SQL queries by injecting malicious code through the 'id' parameter. Attackers can send requests to the admin-ajax.php endpoint with the action parameter set to 'dex_bccf_calendar_ajaxevent' and supply crafted SQL commands in the 'id' parameter to extract sensitive database information.
What to do
Update the plugin to the newest version.
Full record and what to do →NVD record wordpress.dwbooster.com exploit-db.com
May 28, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: Missing AuthorizationCVE-2026-6937 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.6.11.8 due to the plugin not properly verifying that a user is authorized to perform an action via the bulk appointments REST API endpoint. This makes it possible for unauthenticated attackers to modify arbitrary appointment records including customer PII, payment status, and meeting URL fields, and to expose full customer PII from existing appointment records via the bulk endpoint response. The public nonce is a static, user-independent value present in the HTML source of any page hosting the [ssa_booking] shortcode, meaning any visitor who has viewed such a page can obtain it and target any appointment in the system without authentication.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.11.8
What to do
Affects up to 1.6.11.8. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
May 28, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: Time-based blind SQL InjectionCVE-2026-7797 · WordPress plugins & themes · reported by WordfenceHigh 7.5
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'append_where_sql' parameter in all versions up to, and including, 1.6.11.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The /appointments/bulk REST endpoint is reachable by unauthenticated attackers because its permission check accepts a public nonce that is embedded in the booking widget's frontend JavaScript (ssa.api.public_nonce) and visible to all site visitors; exploitation requires issuing the request as a PUT with an application/x-www-form-urlencoded body so that PHP's superglobals are not populated and the blocklist check silently passes.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.11.8
What to do
Affects up to 1.6.11.8. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
May 26, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: Denial of serviceCVE-2026-7493 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to denial of service in all versions up to, and including, 1.6.11.5. This is due to a publicly accessible REST API endpoint (/wp-json/ssa/v1/async) that calls PHP's sleep() function on a user-supplied delay parameter without any rate limiting. This makes it possible for unauthenticated attackers to exhaust PHP worker processes, denying access to the site to legitimate users.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.11.5
What to do
Affects up to 1.6.11.5. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org wordfence.com
May 6, 2026Appointment Booking Calendar: Missing AuthorizationCVE-2026-4807 · WordPress plugins & themes · reported by WordfenceMedium 6.5
The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 1.6.10.6. This is due to a flawed authorization logic in the nonce_permissions_check() method combined with the public exposure of a site-wide reusable nonce. The plugin exposes a public_nonce value through the /wp-json/ssa/v1/embed-inner endpoint, which is accessible to unauthenticated users. The appointment deletion endpoint at /wp-json/ssa/v1/appointments/{id}/delete and /wp-json/ssa/v1/appointments/bulk use a permission check that accepts requests containing both an X-WP-Nonce header (with any arbitrary value) and an X-PUBLIC-Nonce header (with the valid public nonce). When the X-WP-Nonce validation fails, the function falls back to validating the X-PUBLIC-Nonce without properly rejecting the request. Since the public_nonce is exposed to all unauthenticated visitors and is site-wide (not user-specific or appointment-specific), attackers can obtain it and use it to view details of arbitrary appointments, including the public_edit_url, or delete arbitrary appointments by ID. This makes it possible for unauthenticated attackers to view, delete or modify any
Product
Appointment Booking Calendar
Affected
up to 1.6.10.6
What to do
Affects up to 1.6.10.6. Update Appointment Booking Calendar to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Apr 24, 2026Booking Calendar Contact Form: Insecure Direct Object ReferenceCVE-2026-6810 · WordPress plugins & themes · reported by WordfenceMedium 5.3
The Booking Calendar Contact Form plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.2.63 via the dex_bccf_admin_int_calendar_list.inc.php file due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to takeover other user's calendars and view user data associated with the calendar.
Product
Booking Calendar Contact Form
Affected
up to 1.2.63
What to do
Affects up to 1.2.63. Update Booking Calendar Contact Form to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Mar 25, 2026Booking calendar, Appointment Booking System: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVE-2026-25435 · WordPress plugins & themes · reported by PatchstackHigh 7.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpdevart Booking calendar, Appointment Booking System booking-calendar allows Stored XSS.This issue affects Booking calendar, Appointment Booking System: from n/a through <= 3.2.36.
Product
Booking calendar, Appointment Booking System
Affected
up to 3.2.36
What to do
Affects up to 3.2.36. Update Booking calendar, Appointment Booking System to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record patchstack.com
Mar 19, 2026Appointment Booking Calendar — Simply Schedule Appointments Booking: SQL InjectionCVE-2026-3658 · WordPress plugins & themes · reported by WordfenceHigh 7.5
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the 'fields' parameter in all versions up to, and including, 1.6.10.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database, including usernames, email addresses, and password hashes.
Product
Appointment Booking Calendar — Simply Schedule Appointments Booking
Affected
up to 1.6.10.0
What to do
Affects up to 1.6.10.0. Update Appointment Booking Calendar — Simply Schedule Appointments Booking to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org
Mar 13, 2026Appointment Booking Calendar — Simply Schedule Appointments: Unauthorized access of sensitive dataCVE-2026-3045 · WordPress plugins & themes · reported by WordfenceHigh 7.5
The Appointment Booking Calendar — Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound `public_nonce` is exposed to unauthenticated users through the public `/wp-json/ssa/v1/embed-inner` REST endpoint, and (2) the `get_item()` method in `SSA_Settings_Api` relies on `nonce_permissions_check()` for authorization (which accepts the public nonce) but does not call `remove_unauthorized_settings_for_current_user()` to filter restricted fields. This makes it possible for unauthenticated attackers to access admin-only plugin settings including the administrator email, phone number, internal access tokens, notification configurations, and developer settings via the `/wp-json/ssa/v1/settings/{section}` endpoint. The exposure of appointment tokens also allows an attacker to modify or cancel appointments.
Product
Appointment Booking Calendar — Simply Schedule Appointments
Affected
up to 1.6.9.29
What to do
Affects up to 1.6.9.29. Update Appointment Booking Calendar — Simply Schedule Appointments to the newest version and check its changelog mentions this fix; if there isn’t one yet, deactivate it until there is.
Full record and what to do →NVD record plugins.trac.wordpress.org plugins.trac.wordpress.org

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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