SYMPTOMS
SQL injection vulnarability which allows to modify Plesk database.RESOLUTION
Please download the following file:For Plesk 7.6.1
http://download1.swsoft.com/Plesk/Autoupdate/Windows/7.6.1/123413/auth.php3
For Plesk 8.1.0
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.0/123413/auth.php3
For Plesk 8.1.0.3
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.0.3/123413/auth.php3
For Plesk 8.1.1.2
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.1.2/123413/auth.php3
For Plesk 8.2
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.2.0/123413/auth.php3
and place it to %plesk_dir%\admin\auto_prepend folder.
Note: Please see how to install Plesk hotfixes properly.
No other additional actions are required. Plesk is secured now.
Additional information
Plesk versions below 7.6.1 must be upgraded to one of the latest versions and corresponding patch should be applied there.