Directory traversal vulnerability in header.php in TXTshop beta 1.0 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the language parameter.
https://www.exploit-db.com/exploits/6816
https://exchange.xforce.ibmcloud.com/vulnerabilities/46063
http://www.securityfocus.com/bid/31885
http://www.securityfocus.com/archive/1/497752/100/0/threaded