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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.
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.
https://lemmy.ca/post/1311411
I'm copying all links into a brand new incognito mode window for now.