Cross-site scripting (XSS) vulnerability in Webmin 1.540 and earlier allows local users to inject arbitrary web script or HTML via a chfn command that changes the real (aka Full Name) field, related to useradmin/index.cgi and useradmin/user-lib.pl.
https://github.com/webmin/webmin/commit/46e3d3ad195dcdc1af1795c96b6e0dc778fb6881
http://www.securityfocus.com/bid/47558
http://www.mandriva.com/security/advisories?name=MDVSA-2011:109