Directory traversal vulnerability in inc/setLang.php in Greg Neustaetter gCards 1.45 and earlier allows remote attackers to include and execute arbitrary local files via directory traversal sequences in a lang[*][file] parameter, as demonstrated by injecting PHP sequences into an Apache access_log file, which is then included by index.php.
https://www.exploit-db.com/exploits/1595
http://www.vupen.com/english/advisories/2006/1015