Multiple cross-site scripting (XSS) vulnerabilities in admin/login in X3 CMS 0.4.3.1 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) PATH_INFO, (2) username, or (3) password parameter.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.