PHP remote file inclusion vulnerability in footer.inc.php in PowerClan 1.14a and earlier, when register_globals is enabled, allows remote attackers to execute arbitrary PHP code via a URL in the settings[footer] parameter.
https://www.exploit-db.com/exploits/2973
http://www.vupen.com/english/advisories/2006/5119
http://www.securityfocus.com/bid/21707
http://www.securityfocus.com/archive/1/490009/100/0/threaded