The Cubecart::_basket method in classes/cubecart.class.php in CubeCart 5.0.0 through 5.2.0 allows remote attackers to unserialize arbitrary PHP objects via a crafted shipping parameter, as demonstrated by modifying the application configuration using the Config object.
https://exchange.xforce.ibmcloud.com/vulnerabilities/81920
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-1501
http://www.securityfocus.com/bid/57770
http://www.exploit-db.com/exploits/24465
http://secunia.com/advisories/52072
http://packetstormsecurity.com/files/120094/CubeCart-5.2.0-PHP-Object-Injection.html
http://karmainsecurity.com/KIS-2013-02
http://forums.cubecart.com/?showtopic=47026
http://archives.neohapsis.com/archives/bugtraq/2013-02/0032.html