Multiple Cross-site scripting (XSS) vulnerabilities in Webmin before 1.850 allow remote attackers to inject arbitrary web script or HTML via the sec parameter to view_man.cgi, the referers parameter to change_referers.cgi, or the name parameter to save_user.cgi. NOTE: these issues were not fixed in 1.840.
https://github.com/webmin/webmin/commit/c2d4a90639afb2403979aa91ba75cb332ae16d1b
https://github.com/webmin/webmin/commit/a330e913ee099cb9c586ce1b9267647fc566c1ab
http://www.webmin.com/changes.html