Funnelforms Free <= 3.7.3.2 - Authenticated (Administrator+) Arbitrary File Deletion

The Funnelforms Free plugin for WordPress is vulnerable to arbitrary file deletion in all versions up to, and including, 3.7.3.2 via the 'af2DeleteFontFile' function. This is due to the plugin not properly validating a file or its path prior to deleting it. This makes it possible for authenticated attackers, with administrator-level access and above, to delete arbitrary files, including the wp-config.php file, which can make site takeover and remote code execution possible.