The WP Mailster plugin before 1.5.5 for WordPress has XSS in the unsubscribe handler via the mes parameter to view/subscription/unsubscribe2.php.
- https://packetstormsecurity.com/files/145222/WordPress-WP-Mailster-1.5.4.0-Cross-Site-Scripting.html
- https://wpvulndb.com/vulnerabilities/8973
- https://github.com/20142995/nuclei-templates
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ARPSyndicate/kenzer-templates