source: http://www.securityfocus.com/bid/23528/info

PHP-Nuke is prone to multiple SQL-injection vulnerabilities because the application fails to properly sanitize user-supplied input before using it in an SQL query.

A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database implementation.

PHP-Nuke 8.0.0.3.3b is vulnerable to these issues; other versions may also be affected. 

http://www.example.com/nuke/?%2f*

http://www.example.com/html80/?%2f**/UNION%2f**/SELECT 