Facebook has reported a security vulnerability in one of their features that has affected 50 million accounts. The vulnerability was discovered in the “View as” feature in Facebook that lets users see what their profile looks like to others. This bug allowed hackers to steal access tokens which granted them access to other people’s Facebook accounts.
50 million Facebook accounts were compromised because of the vulnerability and Facebook has reset their access tokens. In addition, tokens for another 40 million accounts have also been reset. These 90 million users will have to login to Facebook again the next time they visit it.
Facebook is working on fixing the vulnerability, however it is advisable to change your Facebook password and change it regularly.
Never use the same password across different accounts.
Change passwords frequently.
Generate strong, uncrackable passwords at strongpassword.io.