Directory traversal vulnerability in index.php in webEdition 6.0.0.4 and earlier, when register_globals is enabled and magic_quotes_gpc is disabled, allows remote attackers to include and execute arbitrary files via a .. (dot dot) in the WE_LANGUAGE parameter.
https://www.exploit-db.com/exploits/8328
https://exchange.xforce.ibmcloud.com/vulnerabilities/49530
http://www.securityfocus.com/archive/1/502315/100/0/threaded