Facebook’s stunning disclosure of a massive hack on Friday in which attackers gained access tokens to at least 50 million accounts—bypassing security measures and potentially giving them full control of both profiles and linked apps—has already stirred the threat of a $1.63 billion dollar fine in the European Union, according to the Wall Street Journal.

The bug, which exploited flaws in the site’s “View As” and video uploader feature to gain access to the accounts, forced Facebook to reset access tokens for 50 million users and reset those for 40 million others as a precaution. (That means if you were logged out of your devices, you were affected.) Facebook has not said whether the attackers attempted to extract data from the affected profiles, but vice president of product management Guy Rosen told reporters they had attempted to harvest private information from Facebook’s systems, according to the New York Times. Rosen also said Facebook was unable to determine the extent to which third-party apps could have been compromised.

Source: Facebook Could Face Up to $1.63 Billion Fine for Latest Hack Under the GDPR

The site itself was compromised on Tuesday