The Frontend Post Submission Manager Lite – Frontend Posting WordPress Plugin plugin for WordPress is vulnerable to unauthorized loss of data due to an incorrect authorization check on the 'media_delete_action' function in all versions up to, and including, 1.2.6. This makes it possible for unauthenticated attackers to delete arbitrary attachments.
https://plugins.trac.wordpress.org/changeset/3427082/frontend-post-submission-manager-lite