The Interactive Contact Form and Multi Step Form Builder with Drag & Drop Editor – Funnelforms Free plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'fnsf_af2_handel_file_upload' function in all versions up to, and including, 3.7.3.2. This makes it possible for unauthenticated attackers to upload arbitrary media to the site, even if no forms exist.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.