Facebook employees reportedly feel guilty that the company didn't fix a known security risk fast enough to prevent its biggest data breach ever
Facebook was repeatedly warned about a security risk that was taken advantage of in a hack involving 50 million accounts in 2018, and failed to fix it in time,Concerns about the risk posed by "access tokens" — digital keys that allow access to users' accounts — were raised as early as December 2017, the Telegraph reported, citing legal documents from a class-action lawsuit filed in the US against the company., with the access tokens of 50 million people stolen.
Facebook said in a statement to Business Insider that the risk was not from access tokens themselves, but "the obscure interaction of several different Facebook features" that allowed hackers to generate access tokens for users. Hackers were able to generate tokens for other users, gaining access to their accounts, through Facebook's "View As" feature, leading to 50 million accounts' access tokens being compromised.for the 50 million accounts that were hacked, as well as an additional 40 million accounts that had been used for a View As look-up within the previous year, leading to 90 million Facebook users being logged out of their accounts.
Employees said that changes that could have prevented the hack were not completed, and that warnings were "almost all ignored," the report said.
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