Photobucket Private Album Access via CSRF

I've been playing a lot with CSRF lately. As I find ways to manipulate more and more services with what is probably the most basic type of attack possible, I keep getting surprised by the insanely cool things that one can do with it.

Photobucket allows users to make albums either "Public" or "Private", the latter of which will enable access only with a guest password. While chatting with a friend online recently, I tried to view one of her private albums. Knowing what I do for a living, she gave me permission to do so, but said I'd have to find my way in without her help. So I did.

The form for setting a private album's password, as well as the one for making an album public, both are vulnerable to CSRF. In fact, both use GET parameters to do their magic, so it's actually pretty trivial to pull off a successful attack. I wrote a proof of concept, but it's really not that complicated.

Not only can users' albums be made public, but variations on this exploit can be used to change passwords on albums, delete photos, and compromise account passwords. This really is a serious issue- while Photobucket's TOS may protect them from liability (and may or may not hold up in court), there are a lot of extremely private photos stored there.

I emailed a vulnerability report to Photobucket on the morning of 4-9-2009, but have not received a response.