https://www.cnet.com/news/please-review-your-posts-facebook-accidentally-shared-14-million-users-private-posts/

Facebook has admitted to an incredibly embarassing bug -- one that shared the private posts of 14 million users publicly.

According to Facebook, only four days worth of posts were accidentally shared -- between May 18 and May 22, and the company has automatically changed them back to private. Your secrets are safe -- unless someone saw them, of course.