Multiple cross-site scripting (XSS) vulnerabilities in index.php in VirtueMart (formerly known as mambo-phpShop) Joomla! eCommerce Edition CMS 1.0.11, and possibly earlier, allow remote attackers to inject arbitrary web script or HTML via the Itemid parameter in a (1) com_contact or (2) subscribe action.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29207
http://www.vupen.com/english/advisories/2006/3848
http://www.securityfocus.com/archive/1/447168/100/0/threaded