source: https://www.securityfocus.com/bid/13557/info
PHP Nuke is prone to an input validation vulnerability. Reports indicate the script fails to correctly identify potentially dangerous characters when the characters are double hex-encoded (i.e. %25%41 == %41 == A).
A remote attacker may exploit this issue to bypass PHP Nuke protections and exploit issues that exist in the underlying PHP Nuke installation.
Will be filtered:
'modules.php?FistFucker=()'
Will be bypassed:
'modules.php?FistFucker=%2528%2529'
Will be filtered:
'/**/UNION/**/SELECT/**/'
Will be bypassed:
'/%2A%2A/UNION/%2A%2A/SELECT/%2A%2A/'