In that case, the app deliberately exploited Facebook's data practices to harvest people's personal information for political ad targeting purposes. As many as 87 million users may have been affected.

Sensitive Facebook information for up to 120 million users was exposed online for years, researcher says.

The quiz app developer at the center of the Cambridge Analytica scandal, Aleksandr Kogan — who harvested and sold/passed Facebook user data to third parties — has accused Facebook of ...