lib/message.php in X7 Chat 2.0.0 through 2.0.5.1 allows remote authenticated users to execute arbitrary PHP code via a crafted HTTP header to index.php, which is processed by the preg_replace function with the eval switch.Referenceshttp://packetstormsecurity.com/files/128964/X7-Chat-2.0.5-lib-message.php-preg_replace-PHP-Code-Execution.htmlhttp://www.exploit-db.com/exploits/35183http://www.securityfocus.com/bid/71014https://exchange.xforce.ibmcloud.com/vulnerabilities/98513
