WordPress FlatPM plugin before 3.0.13 contains a cross-site scripting vulnerability. The plugin does not sanitize and escape certain parameters before outputting them back in pages, which can be exploited against high privilege users such as admin. An attacker can steal cookie-based authentication credentials and launch other attacks.
GET /wp-admin/admin.php?page=blocks_form&block_cat_ID=1%22+style%3Danimation-name%3Arotation+onanimationstart%3Dalert%28document.domain%29%2F%2F HTTP/1.1