If you haven’t already upgraded tophpbb version 2.0.11, you’d better hurry up and do it, cause time is running out ! There is a new worm on the internet, Net-Worm.Perl.Santy.a. looking for older versions of phpbb forums. When one is found, it is defacing not only the forum, but the entire website.
If your site is defaced, it will look like this:

In the meantime, Google fights back Santy worm