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Type a plugin or theme and the version you run, and we’ll show every known vulnerability that affects it, from the 390,007 records in our vulnerability database. The version is listed under Plugins in your WordPress dashboard.
Plugin · mailoptin
MailOptin
7 known vulnerabilities on record. Add your version above to see which ones affect you.
Oct 16, 2026MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.: Privilege EscalationCVE-2026-109515 · affects up to 1.2.78.6 · reported by WordfenceCritical 9.8
The MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc. plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.2.78.6 This is due to the `subscribe_to_email_list` endpoint accepting an attacker-supplied `optin_data[form_custom_field_mappings]` parameter without any allow-list validation on destination keys, allowing the attacker-controlled mapping to override the administrator's saved mapping and pass arbitrary `wp_users` column names — including `ID` and `user_pass` — directly into `wp_insert_user()` via the `subscribe()` function. This makes it possible for unauthenticated attackers to force `wp_insert_user()` into UPDATE mode on any existing account by supplying a target user's numeric `ID`, overwrite that account's password with a pre-hashed value of their choosing, and thereby take over any WordPress user account — including administrators — leading to full site compromise. Exploitation requires that a WordPress User Registration opt-in form is published somewhere on the site, though the form's UUID is visible in page source and no authentication, nonce, or capability check is required to reach the
NVD recordplugins.trac.wordpress.orgplugins.trac.wordpress.org
Aug 6, 2026Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.CVE-2026-66703 · affects up to 1.2.78.0 · reported by PatchstackMedium 6.5
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
Jul 13, 2026MailOptin: Incorrect Privilege AssignmentCVE-2026-57813 · affects up to 1.2.77.3 · reported by PatchstackCritical 9.8
Incorrect Privilege Assignment vulnerability in properfraction MailOptin mailoptin allows Privilege Escalation.This issue affects MailOptin: from n/a through <= 1.2.77.3.
Sep 3, 2025MailOptin: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVE-2025-58596 · affects up to 1.2.75.0 · reported by PatchstackMedium 5.9
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in properfraction MailOptin mailoptin allows Stored XSS.This issue affects MailOptin: from n/a through <= 1.2.75.0.
Sep 23, 2024Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin: Stored Cross-Site ScriptingCVE-2024-8628 · affects up to 1.2.70.3 · reported by WordfenceMedium 5.4
The Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'post-meta' shortcode in all versions up to, and including, 1.2.70.3 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Apr 6, 2023Auth.CVE-2023-23980 · fixed in 1.2.54.1 · reported by PatchstackMedium 5.9
Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in MailOptin Popup Builder Team MailOptin plugin <= 1.2.54.0 versions.
Sep 23, 2022Unauthenticated Optin Campaign Cache Deletion vulnerability in MailOptin plugin <= 1.2.49.0 at WordPress.CVE-2022-36340 · affects up to 1.2.49.0 · reported by PatchstackMedium 6.5
Unauthenticated Optin Campaign Cache Deletion vulnerability in MailOptin plugin <= 1.2.49.0 at WordPress.
Versions are matched against the affected ranges published with each record. A plugin can ship a fix under its own numbering, so if something looks off, check the linked record. Want the whole site checked at once? Run the free website check.
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