Directory traversal vulnerability in the user_get_profile function in include/functions.inc.php in Coppermine Photo Gallery (CPG) 1.4.18 and earlier, when the charset is utf-8, allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the lang part of serialized data in an _data cookie.
https://www.exploit-db.com/exploits/6178
https://exchange.xforce.ibmcloud.com/vulnerabilities/44133
http://www.securityfocus.com/bid/30480