MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.
mailoptin · plugin
Known security vulnerabilities for MailOptin – Popup, Optin Forms & Email Newsletters for Mailchimp, HubSpot, AWeber Etc.. Find out in seconds which version runs on your site with WP Lens.
6 known vulnerabilities
1 critical · 2 exploitable without logging in · latest Aug 6, 2026
Listed on wordpress.org · latest 1.2.78.4 · last updated Sep 29, 2026 · 10K+ installs
wordpress.org status checked on Oct 2, 2026
Vulnerabilities
- Critical 9.8
CVE-2026-57813unauthenticated≤ 1.2.77.3
WordPress MailOptin plugin <= 1.2.77.3 - Privilege Escalation vulnerability
- Medium 6.5
CVE-2026-66703contributor+≤ 1.2.78.0
WordPress MailOptin plugin <= 1.2.78.0 - Cross Site Scripting (XSS) vulnerability
- Medium 5.9
CVE-2025-58596high privilege≤ 1.2.75.0
WordPress MailOptin Plugin <= 1.2.75.0 - Cross Site Scripting (XSS) Vulnerability
- Medium 5.4
CVE-2024-8628contributor+≤ 1.2.70.3
Popup, Optin Form & Email Newsletters for Mailchimp, HubSpot, AWeber – MailOptin <= 1.2.70.3 - Authenticated (Contributor+) Stored Cross-Site Scripting
- Medium 5.3
CVE-2022-36340unauthenticated≤ 1.2.49.0
WordPress MailOptin plugin <= 1.2.49.0 - Unauthenticated Optin Campaign Cache Deletion vulnerability
- Medium 4.8
CVE-2023-23980admin≤ 1.2.54.0
WordPress MailOptin Plugin <= 1.2.54.0 is vulnerable to Cross Site Scripting (XSS)
The access label is read from the record's own text (e.g. “subscriber+”: subscriber and above). When the text names no role, CVSS decides between “login required” and “high privilege”; no role name is invented. “Needs a click”: the attack depends on a logged-in user following a link (CSRF, reflected XSS).