Dynamic variable evaluation vulnerability in index.php in Jetbox CMS 2.1 SR1 allows remote attackers to overwrite configuration variables via URL parameters, which are evaluated as PHP variable variables.
http://www.securityfocus.com/bid/19303
http://www.securityfocus.com/archive/1/441980/100/0/threaded
http://securityreason.com/securityalert/1339