Earlier this month, Tumblr
revealed that it had recently become aware that user addresses and salted and hashed passwords dating back to 2013 had fallen into the hands of hackers.
We recently learned that a third party had obtained access to a set of Tumblr user email addresses with salted and hashed passwords from early 2013, prior to the acquisition of Tumblr by Yahoo. As soon as we became aware of this, our security team thoroughly investigated the matter. Our analysis gives us no reason to believe that this information was used to access Tumblr accounts. As a precaution, however, we will be requiring affected Tumblr users to set a new password.
Quite sensibly, Tumblr said it would be asking affected users to choose new passwords.
But there were some things Tumblr didn’t say.
For instance, in its brief announcement, didn’t say just
how many Tumblr users were impacted by the breach.
