HUGE: A source just tipped me off about a vulnerability that lets attackers find the profiles of almost any Facebook account using an email list.

Facebook knows about the vulnerability and won't fix it even though it affects almost every Facebook user!https://t.co/uR07Xr6NDb pic.twitter.com/WtyMmrulkO

— Alon Gal (Under the Breach) (@UnderTheBreach) April 20, 2021