Mailster WordPress Newsletter Plugin
mailster · plugin
Known security vulnerabilities for Mailster WordPress Newsletter Plugin. Find out in seconds which version runs on your site with WP Lens.
5 known vulnerabilities
1 critical · 4 exploitable without logging in · latest Jul 23, 2026
Listed on wordpress.org · latest 2.0.2 · last updated Jun 28, 2024 · 7K+ installs
Not updated since Jun 28, 2024. A component left without updates for over two years should not be expected to patch new vulnerabilities.
wordpress.org status checked on Oct 2, 2026
Vulnerabilities
- Critical 9.1
CVE-2026-27064editor+≤ 4.1.17
WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability
- High 8.1
CVE-2024-32523unauthenticated≤ 4.0.6
WordPress Mailster plugin <= 4.0.6 - Unauthenticated Local File Inclusion vulnerability
- High 7.1
CVE-2025-64203unauthenticated · needs a click≤ 4.1.14
WordPress Mailster plugin < 4.1.14 - Cross Site Scripting (XSS) vulnerability
- Medium 6.1
CVE-2024-37433unauthenticated · needs a click≤ 4.0.9
WordPress Mailster plugin <= 4.0.9 - Reflected Cross Site Scripting (XSS) vulnerability
- Medium 6.1
CVE-2024-30503unauthenticated · needs a click≤ 4.0.6
WordPress Mailster plugin <= 4.0.6 - Reflected Cross Site Scripting (XSS) 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).