Since an official e-mail regarding this has now been sent out. I have removed the pinning of this post.
Here is the e-mail I received
Dear Thingiverse User,
We became aware of an internal error that led to the exposure of user data. As a precaution, we initiated the password reset process for your account. Please proceed to the next steps here, to complete it. If you have already reset your password, you will have to do it again.
We sincerely apologize for this incident and regret any inconvenience it has caused.
Nadav Goshen
CEO
MakerBot
