Facebook hacked 50 million user accounts, putting the privacy of those users’ personal data at risk. Facebook says the attackers behind the breach abused its “View As” privacy feature. The social media giant says its investigation into the breach is ongoing. Security researchers say that this is the rare breach that might actually deserve to be labeled as “sophisticated” Facebook says it discovered the attack on Tuesday, it’s not clear when the breach began, although it may date from last July. The attack enabled a hacker to obtain an access token, which Facebook users can utilize to authenticate to multiple services in the background.”]
Source: https://www.govinfosecurity.com/blogs/facebook-breach-attackers-exploited-privacy-feature-p-2667