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.
6.1CVSS
6AI Score
0.002EPSS
WP Mailster 1.6.18.0 allows XSS when a victim opens a mail server's details in the mst_servers page, for a crafted server_host, server_name, or connection_parameter parameter.
6.1CVSS
5.9AI Score
0.001EPSS