The admin panel in Tr Forum 2.0 accepts a username and password hash for authentication, which allows remote authenticated users to perform unauthorized actions, as demonstrated by modifying user settings via the id parameter to /membres/modif_profil.php, and changing a password via /membres/change_mdp.php. NOTE: this can be leveraged with other Tr Forum vulnerabilities to allow unauthenticated attackers to gain privileges.
https://www.exploit-db.com/exploits/2297
https://exchange.xforce.ibmcloud.com/vulnerabilities/28756
http://www.vupen.com/english/advisories/2006/3452
http://www.securityfocus.com/archive/1/445079/100/0/threaded
http://securitytracker.com/id?1016788