Cross-site scripting (XSS) vulnerability in vpn/js/gateway_login_form_view.js in Citrix NetScaler Gateway 11.0 before Build 66.11 allows remote attackers to inject arbitrary web script or HTML via the NSC_TMAC cookie.
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.