Directory traversal vulnerability in index.php in OpenCart 1.1.8 allows remote attackers to read arbitrary files via a .. (dot dot) in the route parameter.
https://www.exploit-db.com/exploits/8539
https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-1616
http://www.securityfocus.com/bid/34724
http://www.securityfocus.com/archive/1/532233/100/0/threaded