I wonder how secure UBB.threads forum software is, looks like Basil is running close to the latest version, but here is a 6.5.1.1 out and a new beta 6.5.2 out shortly....
I manage a forum that uses PHPBB, and although it has plenty of security holes they're pretty good about patching them regularly. As long as I stay on top of the updates, I don't get hacked....