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 can only log in on incognito mode, which makes me think my cookie has been stolen or whatever. So my question is, what should I be doing about that?
Your session token is still being cached by your browser. Its trying to authenticate with the server with that. The server is rejecting that token. If you can access the logout button, click it. If not, clear your cookies and cache for lemmy.world and refresh the page
I could only log on after clearing the app data and cache on Android, try that
Delete cookies for lemmy.world and then you should be okay to log in again.
