If you have not grasped the extent of this fiasco, it could be because it was late evening in the U.S. on Friday last and the weekend has dawned in most other parts of the world when this new broke.

In a nutshell, a Facebook app developed by one Dr. Aleksandr Kogan called “thisisyourdigitallife” had obtained user data through that app (which was originally built in 2014) by scraping data from the profiles of people who took the quiz as well as that of their friends—apparently allowed under Facebook’s policy for third-party apps at the time!!

This is the scariest part: Although only about 270,000 people took the survey, the New York Times reports, yet that Dr. Kogan was able to obtain data on 50 million users, probably through connections and other means!

And per the report, Cambridge Analytica paid to acquire the personal information from the Doctor, who Facebook says, claimed to be collecting it for academic purposes. After initially denying the claims, Facebook posted a statement acknowledging the breach and promising to take action.