The HT Mega – Absolute Addons For Elementor plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 2.9.1 via the 'save_block_css' function. This makes it possible for authenticated attackers, with Author-level access and above, to create CSS files in any directory, and delete CSS files in any directory in a Windows environment.
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.