The VBSEO exploit just took another turn. Some forum owners have updated their sites after being hit by the first wave of this VBulletin hack but kept VBSEO, along with the apparent vulnerabilities. Now there is a second wave of hackings exploiting the hole and obtaining admin access, inspiring this thread on the vbulletins forum [vbulletin.com].
It's a mess. I saw one site where the entire site redirects to another website. I did some searching and found a forum that had at least one member's entire five year posting history replaced by links to a specific site. Really nasty stuff.