Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation
optinmonster · plugin
Known security vulnerabilities for Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation. Find out in seconds which version runs on your site with WP Lens.
5 known vulnerabilities
4 exploitable without logging in · 1 with public exploit code · latest May 25, 2024
Listed on wordpress.org · latest 2.17.1 · last updated Aug 14, 2026 · 1M+ installs
wordpress.org status checked on Oct 2, 2026
Vulnerabilities
- High 8.2
CVE-2021-39341unauthenticated≤ 2.6.4
OptinMonster <= 2.6.4 Unprotected REST-API Endpoints
- Medium 6.1
CVE-2021-39325unauthenticated · needs a click≤ 2.6.0
OptinMonster <= 2.6.0 Reflected Cross-Site Scripting
- Medium 5.4
CVE-2024-4045contributor+≤ 2.16.1
Popup Builder by OptinMonster – WordPress Popups for Optins, Email Newsletters and Lead Generation <= 2.16.1 - Authenticated (Contributor+) Stored Cross-Site Sc
- Medium 5.3
CVE-2016-10996unauthenticated
The optinmonster plugin before 1.1.4.6 for WordPress has incorrect access control for shortcodes because of a nonce leak.
- Medium 4.3
CVE-2024-33691unauthenticated · needs a click≤ 2.15.3
WordPress Popup Builder by OptinMonster plugin <= 2.15.3 - Cross Site Request Forgery (CSRF) Notice Dismissal vulnerability
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).