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.
http://www.securitytracker.com/id/1036020
http://www.securityfocus.com/archive/1/538515/100/0/threaded
http://support.citrix.com/article/CTX213313
http://persicon.com/tl_files/advisories/PERSICON-advisory-2016-No-1-citrix.txt