While I was asleep, apparently the site was hacked. Luckily, (big) part of the lemmy.world team is in US, and some early birds in EU also helped mitigate this.
As I am told, this was the issue:
- There is an vulnerability which was exploited
- Several people had their JWT cookies leaked, including at least one admin
- Attackers started changing site settings and posting fake announcements etc
Our mitigations:
- We removed the vulnerability
- Deleted all comments and private messages that contained the exploit
- Rotated JWT secret which invalidated all existing cookies
The vulnerability will be fixed by the Lemmy devs.
Details of the vulnerability are here
Many thanks for all that helped, and sorry for any inconvenience caused!
Update While we believe the admins accounts were what they were after, it could be that other users accounts were compromised. Your cookie could have been ‘stolen’ and the hacker could have had access to your account, creating posts and comments under your name, and accessing/changing your settings (which shows your e-mail).
For this, you would have had to be using lemmy.world at that time, and load a page that had the vulnerability in it.
I don’t know exactly what I did but I think it was I went to profile (which showed my as account logged in), then clicked the anonymous bar to go to accounts and there was an option to log out.
Thanks, this worked for me! Signed in to the bugged state, switched to anonymous, hit sign out there, cleared cache, signed back in. Kind of confusing, but it worked.
Wow that worked. I wonder why it wasn’t there before.
I tried that and the option to logout isn’t there. It also keeps asking if I want to switch to my account, even though it shows my username at the top.