His0k4 has discovered a vulnerability in the MyContent component for Joomla!, which can be exploited by malicious people to conduct SQL injection attacks.

Input passed to the "id" parameter in the Joomla! installation's index.php script (when "option" is set to "com_mycontent" and "task" to "view") is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation allows e.g. retrieving administrator password hashes, but requires knowledge of the database table prefix. The vulnerability is confirmed in version 1.1.13. Prior versions may also be affected.

Ref: http://milw0rm.com/exploits/5714
Ref: http://www.securityfocus.com/archive/1/510374/30/0/threaded
Ref: http://secunia.com/advisories/30490/