The vulnerability combines three distinct bugs that was exploited by hackers, who got the "access token" to enter accounts of 50 million users, possibly 90 million, gaining access to private messages, posts and pictures.
Facebook has given no comments on this yet but if the hackers sneaked into the user account chances are that some data must have been stolen.
On the blog post, Guy Rosen, VP of Product Management, stated that the company has reset the access tokens of the nearly 50 million accounts which were affected to protect their security.
MPs have demanded that Mark Zuckerberg travels to the United Kingdom to face questions about his "terrible disrespect" for the data of citizens, following last week's data breach at Facebook that resulted in 50 million user accounts being exposed to hackers. Both allege that Facebook's lack of proper security has exposed them and additional potential class members to a significantly increased chance of identity theft as a result of the breach.
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This means that any third-party app that uses the "Facebook Login" feature could be at risk, including apps such as Instagram, Tinder, Airbnb and many others. But the benefit comes at a cost, all these platforms will share the same access credentials.
Facebook said in a statement Monday that developers of apps that use Facebook login "can detect the forced logout actions we took on Friday and protect people using their apps".
Third, they are temporarily turning off the "View As" feature while we conduct a thorough security review.
Research on several dark web marketplaces and uncovered that criminals can buy Facebook logins for just £3, and email logins for as little as £2.10. Facebook acknowledged that not only had hackers obtained the ability to access Facebook accounts of affected users, they could also access any other service in which a Facebook account was used for registration.
Europe's General Data Protection Regulation law, which went into effect in May, levies heavy fines-$23 million or 4% of world-wide revenue the previous year, whichever is higher-if it determines a company didn't do enough to protect its customers' data. You can see devices as well as their current location, and in case you see any unknown locations or devices, you can simply click on the remove button.
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Importantly, if you log into other services with Facebook, this access token would treat you as being logged into those services too.
The hack allowed attackers to convince these websites that they were already logged in - sneaking onto your account under the radar.
"The access token enables someone to use the account as if they were the account holder themselves".
In 2011 it signed a consent decree with U.S. consumer protection agency the Federal Trade Commission (FTC) settling charges that it deceived consumers by telling them they could keep their information on Facebook private, and then allowing it to be shared and made public.
If you were hacked, you'll have been logged out and received notification.
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