Dynamic variable evaluation vulnerability in shared/config/tce_config.php in TCExam 4.0.011 and earlier allows remote attackers to conduct cross-site scripting (XSS) and possibly other attacks by modifying critical variables such as $_SERVER, as demonstrated by injecting web script via the _SERVER[SCRIPT_NAME] parameter.
https://www.exploit-db.com/exploits/3816
https://exchange.xforce.ibmcloud.com/vulnerabilities/33957
http://www.securityfocus.com/bid/23704
http://www.attrition.org/pipermail/vim/2007-May/001572.html