What the vulnerability does
01Description
The Formidable Digital Signatures plugin for WordPress is vulnerable to file deletion due to insufficient file path validation in the delete_file function in all versions up to, and including, 3.0.6. This makes it possible for unauthenticated attackers to delete files on the server by supplying an attacker-controlled filename in the item_meta[field_id][content] parameter alongside the delete_saved_image flag during the standard entry-creation POST flow on any form that accepts anonymous submissions.
Explanation of Vulnerability in Simple Terms
02Summary
Formidable Digital Signatures versions 3.0.6 and earlier contain a path traversal vulnerability that allows unauthenticated attackers to read, modify, or delete arbitrary files on the server. The vulnerability stems from insufficient validation of file paths, enabling attackers to navigate outside intended directories using relative path sequences. This affects confidentiality, integrity, and availability of the entire site.
What an attacker can do
03Attacker Capabilities
Read, modify, or delete any file on the server without authentication.
Potential impact on your site
04Site Impact
Complete compromise of site files, database credentials, and configuration data; potential total site takeover.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
August 11, 2026
CVE published
