Hi there! Looks like you linked to a Lemmy community using an URL instead of its name, which doesn’t work well for people on different instances. Try fixing it like this: !fediverse@lemmy.ml

The attack shouldn’t have exposed passwords or hashes, only the JWT cookie. The secret on the server has been changed so all old cookies should no longer work.

There is a very small possibility that email address may have been able to be seen if they logged is as you, but they were looking for admin accounts