Q&A website Quora disclosed on Monday that one of its systems was accessed without authorization by hackers on Friday, with the user data of approximately 100 million users affected.

Compromised information include:

  • Account information, e.g. name, email address, encrypted (hashed) password, data imported from linked networks when authorized by users.
  • Public content and actions, e.g. questions, answers, comments, upvotes
  • Non-public content and actions, e.g. answer requests, downvotes, direct messages.

Users whose accounts may have been affected have been logged out of the platform, according to Quora. The company also said it is notifying users, and is also working with law enforcement to address the breach.