Ninja Forms <= 3.6.24 - Authenticated (Admin+) Arbitrary File Deletion

The Ninja Forms plugin for WordPress is vulnerable to arbitrary file deletions in versions up to, and including, 3.6.24. This is due to insufficient restriction on the file path that can be supplied during file deletion. This makes it possible for authenticated attackers, with administrative-level access, to delete arbitrary files on the server. One such file that could be targeted is wp-config.php which if deleted can make it possible for an attacker to connect a site to their own database and ultimately achieve remote code execution on the server.

An attacker needs Admin access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Ninja Forms 3.6.25 closes this, and updating the plugin is the step that ends it.

• Firewall
• Scanner
• Alerts