Multiple PHP remote file inclusion vulnerabilities in american cart 3.5 allow remote attackers to execute arbitrary PHP code via a URL in the abs_path parameter to (1) index.php, (2) checkout.php, and (3) libsecure.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34165
http://www.securityfocus.com/archive/1/467840/100/0/threaded