A Facebook bug temporarily unblocked people for 800,000 Facebook users, briefly giving blocked individuals access to posts and photos.
Blocking isn’t petty. Okay: sometimes it’s petty. But frequently blocking is a vital tool for personal safety, helping to keep stalkers and abusive former partners at bay.
RELATED: How to Block Someone on Facebook
Facebook knows this, and took the breach seriously in a blog post yesterday:
Starting today we are notifying over 800,000 users about a bug in Facebook and Messenger that unblocked some people they had blocked. The bug was active between May 29 and June 5—and while someone who was unblocked could not see content shared with friends, they could have seen things posted to a wider audience.
The post goes on to say block lists should now be working again, but we recommend you check your blocked list right now, just in case.