The File Manager Advanced Shortcode WordPress plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 2.5.4 (file-manager-advanced-shortcode) and 2.5.6 (advanced-file-manager-pro-premium), via the 'file_manager_advanced' shortcode. This makes it possible for authenticated attackers, with Administrator-level access and above, to include and execute arbitrary JavaScript files on the server. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included. Sites currently using 2.5.4 (file-manager-advanced-shortcode) should be updated to 2.6.0 (advanced-file-manager-pro-premium).
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.