A Cross-Site Scripting (XSS) vulnerability in Fortinet FortiWLC 6.1-x (6.1-2, 6.1-4 and 6.1-5); 7.0-x (7.0-7, 7.0-8, 7.0-9, 7.0-10); and 8.x (8.0, 8.1, 8.2 and 8.3.0-8.3.2) allows an authenticated user to inject arbitrary web script or HTML via non-sanitized parameters "refresh" and "branchtotable" present in HTTP POST requests.