cross-posted from: https://sh.itjust.works/post/923025
lemmy.world is a victim of an XSS attack right now and the hacker simply injected a JavaScript redirection into the sidebar.
It appears the Lemmy backend does not escape HTML in the main sidebar. Not sure if this is also true for community sidebars.
I wonder if there is something the Lemmy.ca admins can do to disable the sidebar or put a workaround in to prevent this.
At this point I’m monitoring inter-instance communications channels non stop even though I should be in bed. I will be temporarily removing admins that have not responded to my inquiry to confirm if they have 2FA authentication turned on as initial access appears to have been gained due to lack of 2FA.
If there’s anything additinal we can do, we will.
Good luck, and thanks for all your hard work. I don’t know if you already saw this, but it looks like this might be the vector for the account compromise. If that’s the case, I don’t think 2FA is enough to protect, because it’s exfiltrating the session cookies of someone already logged in. Seems like the precaution is for admins to avoid clicking any suspicious links. I realize the irony of sharing a link about this, but at least it’s to a thread on this instance.
Introduce minimum password complexity if there’s a config option for it and force admins to reset passwords.
There’s no minimum complexity but I’ve enforced 2FA for all admins. One admin that did not respond has been temporarily removed precautionarily.
