SQL injection vulnerability in auth.inc.php in PHPX 3.5.9 and earlier allows remote attackers to execute arbitrary SQL commands, bypass authentication, and upload arbitrary PHP code via the username parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23459
http://www.vupen.com/english/advisories/2005/2696
http://www.securityfocus.com/archive/1/418253/100/0/threaded