Facebook said it now thinks up to 87 million people, mostly in the United States, may have had their data improperly shared by political targeting firm Cambridge Analytica.
And many more — most users, in fact — probably had their public information scraped by outside companies, it says.
The new Cambridge Analytica estimate, disclosed in a blog post Wednesday where it detailed changes meant to enhance the privacy of its users’ personal information in the wake of a data scandal that has raised doubts over CEO Mark Zuckerberg’s leadership, is higher than the estimate of 50 million people reported three weeks ago by The New York Times and The Observer.

https://www.leadingreporters.com/business-2/beware-your-information-is-not-secure-on-facebook/