SQL injection vulnerability in core/user.php in CS-Cart 1.3.5 and earlier allows remote attackers to execute arbitrary SQL commands via the cs_cookies[customer_user_id] cookie parameter.
https://www.exploit-db.com/exploits/6352
https://exchange.xforce.ibmcloud.com/vulnerabilities/44852
http://www.securityfocus.com/bid/30979
http://www.securityfocus.com/archive/1/495907/100/0/threaded
http://www.gulftech.org/?node=research&article_id=00128-09022008