Hexbear was a victim of a targeted XSS attack similar to the attack many other Lemmy instances have seen.
The account that first leveraged the attack was registered on 2023-07-10 at 03:58 UTC, the fix for the vulnerability was applied by around 04:35 UTC. This leaves a ~40 minute window in which anyone browsing the site could have had their account hijacked.
The attacker was able to act (post, comment, DM) as the account they hijacked. They will also have been able to view/use the compromised account's settings page. This means they will have been able to see users' email addresses. Some accounts that were compromised were temporarily banned, these bans have now been lifted.
If you were using the site during the above time window, please double check your account settings to see if anything was changed.
Passwords were not stolen, JWTs were. We have just invalidated all old JWTs so the attacker no longer has access to the hijacked accounts (this is why all users have been logged out).
input of the old password led to the spinning bear earlier on a non-logged in browser, while the same old password was successful when confirming a new password change in settings on a different browser where I am logged on to the website, it's not the old password itself that's an issue but something that has to be with the process of logging in, else I would not have been able to change my password on the browser I'm still logged in on
ohhhh gotcha
if you can still reproduce the problem on that other browser I'd check for things like cookies and cached service workers and stuff... (if it's firefox, ctrl-shift-e and then go to the storage tab to look at cookies. Things like the domain, expiration date, and settings like httponly, secure, samesite should be innocuous to share but potentially useful to infer if it's an old stuck cookie, or using the wrong domain, etc)