Facebook has approached several security companies about a possible deal, sources say. Wall Street Journal says it’s working with the FBI to find out who is behind the attack. Attackers exploited code that allowed them to steal access tokens that could be used to take over peoples accounts. The attackers also used a technique that let them steal access tokens from the friends of the accounts they already controlled, expanding their reach. The attack stemmed from a vulnerability in the view as feature, which lets people see what their profiles look like to other people.”]
Source: https://hackercombat.com/facebook-to-acquire-cybersecurity-company/