Quora is the most popular Q/A website, said Monday evening that hackers broke into one of its systems and hits information from approximately 100 million users.
CEO Adam D’Angelo confirms in a post the company discovered last week that a malicious third party had gained unauthorized access to one of its systems.
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- Account information, Example – Name, email address, encrypted (hashed) password, data imported from linked networks when authorized by users
- Public content and actions, Example – questions, answers, comments, upvotes
- Non-public content and actions, Example – answer requests, downvotes, direct messages (note that a low percentage of Quora users have sent or received such messages)
- User-imported data from other social networks could also have been taken.
But the majority of the content the hackers accessed was already public on the site — such as questions, answers, and comments, D’Angelo wrote.
“We’re in the process of notifying users whose data has been compromised,” he said.
The company is investigating the issue and said it has “notified law enforcement officials.”
Massive data breaches have become a common occurrence as hackers exploit vulnerabilities in the information technology systems used by businesses.
Quora has updated help section with the information relevant to this incident.