The WP Hide & Security Enhancer plugin for WordPress is vulnerable to arbitrary file contents deletion due to a missing authorization and insufficient file path validation in the file-process.php in all versions up to, and including, 2.5.1. This makes it possible for unauthenticated attackers to delete the contents of arbitrary files on the server, which can break the site or lead to data loss.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.