It seems web hosting companies are finally coming to grips with something most security experts have known for quite some time, phpBB is inherently insecure. According to
Netcraft
some are taking the steps to prevent further exploitation via this application by banning its usage on their servers.
As per
usual phpBB developer's response, they are denying blame and claim such moves are unwarranted, but given their security record during the past 6 months alone this is hardly surprising. Not only are new issues being found, because the developers can't seem to do an security audit, but new versions re-introduce bugs (2.0.15 re-introduced the flaw exploited by Santy worm) that have previously been solved.
I hope other hosting providers will take notice and adopt the same strategy, not only for phpBB2 but for any application with a consistent history of security faults for which the developers do not wish to take responsiblity for. As well as failing to take the time to conduct an extensive security audit of their code.