CVE-2017-17451: Wpmailster Wp Mailster

Medium severity, CVSS 6.1. EPSS: 5.1% chance of exploitation in the next 30 days.

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.

Affected products

• Wpmailster Wp Mailster: before 1.5.5 (fixed in 1.5.5)

Published 2017-12-07. Last modified 2026-06-17.