Mastodawn

Sparsely populated instances may inadvertently leak their users' follower list; even if users have opted to hide their social graph.

This happens because users who have opted to hide their social graph aren't opted-out of their incoming posts being displayed in the social graph.

This can be mitigated. Admins can disable unauthenticated access to the instances federated timeline.

Mastodon, one of many social media platforms on the Fediverse, has attracted a lot of attention since the purchase of Twitter by Elon Musk. ...