Multiple cross-site scripting (XSS) vulnerabilities in the Welcart plugin before 1.4.18 for WordPress allow remote attackers to inject arbitrary web script or HTML via the uscesreferer parameter to (1) classes/usceshop.class.php, (2) includes/edit-form-advanced.php, (3) includes/edit-form-advanced30.php, (4) includes/edit-form-advanced34.php, (5) includes/membereditform.php, (6) includes/ordereditform.php, (7) includes/orderlist.php, or (8) includes/uscesitemmasterlist.php, related to admin.php.