Vulnerability database

16 results

• Oct 16, 2026My Calendar – Accessible Event Manager: Privilege EscalationCVE-2026-104798 · WordPress plugins & themes · reported by WordfenceCritical 9.8

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.8.7. The public `mcs` GET parameter is reflected into post content unsanitized before WordPress core's `do_shortcode` filter runs, allowing an unauthenticated attacker to inject a nested `[my_calendar above=...]` shortcode; `mc_generate_calendar_nav()` then splits the `above` attribute on commas and dispatches each element via `call_user_func()` with no authentication, authorization, or callable allowlist check. This makes it possible for unauthenticated attackers to invoke arbitrary loaded PHP functions, enabling a call chain in which the shortcode `$params` array is passed to `edit_user()` — which PHP coerces to integer `1` as the `$user_id` argument — overwriting the credentials of the initial Administrator account (user ID 1) and granting the attacker full wp-admin access. Exploitation is trivially reachable via the plugin's auto-generated `/my-calendar/` page, which is publicly accessible by default upon plugin activation.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.8.7

  What to do

  Affects up to 3.8.7. Update My Calendar – Accessible Event Manager 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 recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• Sep 9, 2026My Calendar – Accessible Event Manager: Stored Cross-Site ScriptingCVE-2026-77187 · WordPress plugins & themes · reported by WordfenceMedium 6.4

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.8.3

  What to do

  Affects up to 3.8.3. Update My Calendar – Accessible Event Manager 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 recordgithub.complugins.trac.wordpress.org

• Sep 9, 2026My Calendar – Accessible Event Manager: Stored Cross-Site ScriptingCVE-2026-77186 · WordPress plugins & themes · reported by WordfenceMedium 6.4

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'fallback' Shortcode Attribute in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The bypass relies on hex-encoded shortcode attribute payloads (e.g. \x3cscript\x3e), which wp_kses_post cannot strip on save because they appear as literal backslash sequences rather than real HTML tags; WordPress core's shortcode_parse_atts() then calls stripcslashes() at render time, decoding the escapes into real angle brackets before they reach the unescaped sink.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.8.3

  What to do

  Affects up to 3.8.3. Update My Calendar – Accessible Event Manager 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 recordgithub.complugins.trac.wordpress.org

• Jul 8, 2026My Calendar – Accessible Event Manager: Time-based blind SQL InjectionCVE-2026-6854 · WordPress plugins & themes · reported by WordfenceHigh 7.5

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'mc_auth' parameter in all versions up to, and including, 3.7.8 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.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.7.8

  What to do

  Affects up to 3.7.8. Update My Calendar – Accessible Event Manager 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 recordplugins.trac.wordpress.orgwordfence.com

• Jul 2, 2026My Calendar – Accessible Event Manager: Insecure Direct Object ReferenceCVE-2026-11896 · WordPress plugins & themes · reported by WordfenceMedium 5.3

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the 'vcal' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.7.14

  What to do

  Affects up to 3.7.14. Update My Calendar – Accessible Event Manager 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 recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• May 14, 2026My Calendar – Accessible Event Manager: Authorization bypassCVE-2026-7525 · WordPress plugins & themes · reported by WordfenceMedium 4.3

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.7.9. 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 custom-level access and above, to bypass the moderation and approval workflow by tampering with the POST body to publish events or set other unauthorized statuses such as cancelled or private, in ways their role does not permit. While the UI correctly restricts low-privilege users to a draft-only submit button, this restriction is enforced only client-side, making it trivially bypassable by directly manipulating the POST request.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.7.9

  What to do

  Affects up to 3.7.9. Update My Calendar – Accessible Event Manager 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 recordgithub.complugins.trac.wordpress.org

• Apr 16, 2026My Calendar is a WordPress plugin for managing calendar events.CVE-2026-40308 · WordPress plugins & themes · reported by GitHubHigh 8.8

  My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mc_ajax_mcjs_action AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parse_str() without validation, allowing injection of arbitrary parameters including a site value. On WordPress Multisite installations, this enables an unauthenticated attacker to call switch_to_blog() with an arbitrary site ID and extract calendar events from any sub-site on the network, including private or hidden events. On standard Single Site installations, switch_to_blog() does not exist, causing an uncaught PHP fatal error and crashing the worker thread, creating an unauthenticated denial of service vector. This issue has been fixed in version 3.7.7.

  Fixed in

  3.7.7

  What to do

  Update the plugin to 3.7.7 or newer.

  Full record and what to do →NVD recordgithub.comgithub.com

• Mar 4, 2026My Calendar – Accessible Event Manager: Stored Cross-Site ScriptingCVE-2026-2355 · WordPress plugins & themes · reported by WordfenceMedium 6.4

  The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `template` attribute of the `[my_calendar_upcoming]` shortcode in all versions up to, and including, 3.7.3. This is due to the use of `stripcslashes()` on user-supplied shortcode attribute values in the `mc_draw_template()` function, which decodes C-style hex escape sequences (e.g., `\x3c` to `<`) at render time, bypassing WordPress's `wp_kses_post()` content sanitization that runs at save time. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

  Product

  My Calendar – Accessible Event Manager

  Affected

  up to 3.7.3

  What to do

  Affects up to 3.7.3. Update My Calendar – Accessible Event Manager 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 recordplugins.trac.wordpress.orgplugins.trac.wordpress.org

• Dec 9, 2025My Calendar: Missing AuthorizationCVE-2025-67592 · WordPress plugins & themes · reported by PatchstackMedium 4.3

  Missing Authorization vulnerability in Joe Dolson My Calendar my-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects My Calendar: from n/a through <= 3.6.16.

  Product

  My Calendar

  Affected

  up to 3.6.16

  What to do

  Affects up to 3.6.16. Update My 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 recordpatchstack.com

• Apr 2, 2024My Calendar: Does not sanitise and escape some parametersCVE-2024-1274 · WordPress plugins & themes · reported by WPScanMedium 5.4

  The My Calendar WordPress plugin before 3.4.24 does not sanitise and escape some parameters, which could allow users with a role as low as Subscriber to perform Cross-Site Scripting attacks (depending on the permissions set by the admin)

  Product

  My Calendar

  Fixed in

  3.4.24

  What to do

  Update My Calendar to 3.4.24 or newer.

  Full record and what to do →NVD recordwpscan.comwpscan.com

• Mar 15, 2024My Calendar: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVE-2024-25916 · WordPress plugins & themes · reported by PatchstackMedium 6.5

  Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Joseph C Dolson My Calendar allows Stored XSS.This issue affects My Calendar: from n/a through 3.4.23.

  Product

  My Calendar

  Affected

  up to 3.4.23

  What to do

  Affects up to 3.4.23. Update My 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 recordpatchstack.compatchstack.com

• Nov 30, 2023The 'My Calendar' WordPress Plugin, version < 3.4.22 is affected by an unauthenticated SQL injection vulnerability in the 'from' and 'to' parameters in the '/myCVE-2023-6360 · WordPress plugins & themes · reported by vulnreport@tenable.comHigh 8.6

  The 'My Calendar' WordPress Plugin, version < 3.4.22 is affected by an unauthenticated SQL injection vulnerability in the 'from' and 'to' parameters in the '/my-calendar/v1/events' rest route.

  Fixed in

  3.4.22

  What to do

  Update the plugin to 3.4.22 or newer.

  Full record and what to do →NVD recordtenable.comtenable.com

• May 22, 2023Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.4.3 versions.CVE-2023-23813 · WordPress plugins & themes · reported by PatchstackMedium 5.4

  Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.4.3 versions.

  Affected

  up to 3.4.3

  What to do

  Affects up to 3.4.3. 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 recordpatchstack.compatchstack.com

• Mar 15, 2023Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.3.24.1 versions.CVE-2022-47427 · WordPress plugins & themes · reported by PatchstackMedium 5.4

  Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.3.24.1 versions.

  Affected

  up to 3.3.24.1

  What to do

  Affects up to 3.3.24.1. 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 recordpatchstack.compatchstack.com

• Nov 29, 2021My Calendar: Does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the responseCVE-2021-24927 · WordPress plugins & themes · reported by WPScanMedium 5.4

  The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue

  Product

  My Calendar

  Fixed in

  3.2.18

  What to do

  Update My Calendar to 3.2.18 or newer.

  Full record and what to do →NVD recordwpscan.comwpscan.com

• Jan 31, 2013Cross-site scripting (XSS) vulnerability in the My Calendar plugin before 1.10.2 for WordPress allows remote attackers to inject arbitrary web script or HTML viCVE-2012-6527 · WordPress plugins & themes · reported by MITRELow 2.6

  Cross-site scripting (XSS) vulnerability in the My Calendar plugin before 1.10.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO.

  Product

  Cross-site scripting (XSS) vulnerability in the My Calendar

  Fixed in

  1.10.2

  What to do

  Update Cross-site scripting (XSS) vulnerability in the My Calendar to 1.10.2 or newer.

  Full record and what to do →NVD recordplugins.trac.wordpress.orgsecunia.com

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.