F5 BIG-IQ Cloud and Security 4.0.0 through 4.1.0 allows remote authenticated users to change the password of arbitrary users via the name parameter in a request to the user's page in mgmt/shared/authz/users/.
http://www.securityfocus.com/bid/67227
http://www.securityfocus.com/bid/67191
http://www.exploit-db.com/exploits/33143
http://volatile-minds.blogspot.com/2014/05/f5-big-iq-v41020130-authenticated.html
http://support.f5.com/kb/en-us/solutions/public/15000/200/sol15229.html
http://secunia.com/advisories/58440