The data included: "Account information, e.g.name, email address, encrypted (hashed) password, data imported from linked networks when authorised by user".
It adds that the "overwhelming majority of the content accessed was already public on Quora, but the compromise of account and other private information is serious".
Quora pointed out that comments posted anonymously on the platform have not been affected by the latest security breach.
"It is our responsibility to make sure things like this don't happen, and we failed to meet that responsibility", Quora CEO Adam D'Angelo wrote in Monday's post.
"This is one of the most significant data breaches in history given the size - about 500 million people are affected - and the sensitivity of the personal information that was stolen", said CreditCards.com industry analyst Ted Rossman.
If you have created the account using Google or Facebook plug-ins, you need to first generate a password by clicking the "Change Password" link and then click on "create an account password".
Former US president George HW Bush dies aged 94 Bush was a class act - a person of tremendous strength and moral character who exemplified the values of public service". Barbara first met George Snr when she was 17 years old and they married in January 1945, when she was 19.
Quora said, in a statement emailed to members, that they are now investigating exactly how the breach occurred. Some unauthorised third-party gained access to the company's systems.
All Quora users have been logged out and affected users will be forced to change their passwords when they next log in.
Quora said it's in the process of notifying all users who it believes were impacted by the hack.
Quora has posted an extensive FAQ explaining details of the data breach, but the FAQ doesn't mentioned how user passwords were hashed, i.e. run through a one-way encryption algorithm.
Or you could completely delete your account by going to your profile picture settings privacy delete account. Users who chose the same password to protect accounts on a different service should immediately reset those passwords as well. "We have also notified law enforcement officials".
Data scientists will look forward to the accelerates data analytics with RAPIDS , one of the most popular data science workflows. The price is, as you'd expect, pretty impressive, at $2,499, and the TITAN RTX will begin shipping later this month.
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CBSSports.com reports Meyer's teams went 85-9 in his seven seasons as Ohio State coach, including a 55-4 Big Ten record. At 54, Meyer is relatively young for a football coach, but health issues reportedly played a role in his decision.
His latest mini-mogul move: "a line of collectibles and more, now selling at Walmart", the Forbes said in the announcement. Since launching his main channel in 2015, Ryan has amassed more than 17 million followers and close to 26 billion views.
The Supreme Court is delaying arguments by a day while a national day of mourning is held for former President George H.W. Jim McGrath , spokesman for the Bush family, tweeted out a photo on Sunday night, captioning it "mission complete".
Notre Dame Commits React To Irish Playoff Bid
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Pistons beat Warriors to win fifth straight, Raptors roll on
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Khashoggi's private WhatsApp messages may offer new clues
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Michelle Obama reunited with London schoolgirls she met in 2009
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Funeral And Memorial Services Announced for George H.W. Bush
I loved to hear him surprise people with his wild side - explaining the pure joy he felt as he flew and jumped out of planes. Social media users thanked Sully for his services and commented on his and dogs' loyalty generally towards their owners.
Amazon 'testing cashierless technology for bigger stores'
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Urban Meyer Might Help Florida Beat Michigan
Karan Higdon rushed for more than 1,000 yards and Shea Patterson has thrown for 21 touchdowns against six interceptions. Michigan , Michigan State, Western Michigan and Eastern Michigan are all playing in postseason bowl games.
SpaceX calls off launch of satellites
Falcon 9 will be carrying 64 satellites belonging to companies, governments and research institutions in 17 different countries. These new satellite networks could help companies track agricultural shipments or support pipeline monitoring efforts.