About 14 million Facebook users who thought they were posting a message just to friends or smaller groups may have actually been sharing it widely with the general public, writes Sara Salinas of CNBC.
Here is the link: https://www.cnbc.com/2018/06/07/facebook-bug-made-private-posts-of-up-to-14-million-users-public.html
Here is the statement from Facebook: https://newsroom.fb.com/news/2018/06/audience-selector-error/