Absolute path traversal vulnerability in Quick.CMS, version 6.7, the exploitation of which could allow remote users to bypass the intended restrictions and download any file if it has the appropriate permissions outside of documentroot configured on the server via the aDirFiles%5B0%5D parameter in the admin.php page. This vulnerability allows an attacker to delete files stored on the server due to a lack of proper verification of user-supplied input.
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.