The Frontend File Manager Plugin plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the wpfm_delete_multiple_files() function in all versions up to, and including, 21.5. This makes it possible for unauthenticated attackers to delete arbitrary posts.
https://plugins.trac.wordpress.org/changeset/2912124/nmedia-user-file-uploader/trunk/inc/files.php