The Game Users Share Buttons plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the ajaxDeleteTheme() function in all versions up to, and including, 1.3.0. This makes it possible for Subscriber-level attackers to add arbitrary file paths (such as ../../../../wp-config.php) to the themeNameId parameter of the AJAX request, which can lead to remote code execution.
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.