PHP-Nuke copying files security vulnerability (admin.php)

Summary
The remote host seems to be vulnerable to a security problem in PHP-Nuke (admin.php). The vulnerability is caused by inadequate processing of queries by PHP-Nuke's admin.php which enables attackers to copy any file from the operating system to anywhere else on the operating system.
Impact
Every file that the webserver has access to can be read by anyone. Furthermore, any file can be overwritten. Usernames (used for database access) can be compromised. Administrative privileges can be gained by copying sensitive files.
Solution
Change the following lines in admin.php: if($upload) To: if(($upload) && ($admintest)) Or upgrade to the latest version (Version 5.3 and above). Additional information: http://www.securiteam.com/unixfocus/TOBA