The password-change feature in the administrative web interface in Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.1 improperly performs authorization, which allows remote authenticated users to reset arbitrary active-user passwords via unspecified vectors, aka Bug ID CSCuv12338.
http://www.securitytracker.com/id/1033323
http://www.securityfocus.com/bid/76366
http://tools.cisco.com/security/center/viewAlert.x?alertId=40442