X-Cart before 5.1.11 allows remote authenticated users to read or delete address data of arbitrary accounts via a modified (1) update or (2) remove request.
Cross-site scripting (XSS) vulnerability in admin.php in X-Cart 5.1.6 through 5.1.10 allows remote attackers to inject arbitrary web script or HTML via the substring parameter.
Multiple cross-site scripting (XSS) vulnerabilities in cart.php in X-Cart 5.1.8 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) product_id or (2) category_id parameter.