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submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

Update: Federation and community creation are now back online!

Hey all, there's a hack floating around which spreads via federated comments and steals users' Lemmy auth tokens. Lemmy.world and other large instances have been hacked, so we're taking some precautions until this is fixed:

  • We're logging everyone out so that auth tokens reset
  • We're closing off federation and community creation until this is patched

FYI, there are no indications that anyone on our instance has been hacked. We did find ten comments with the code injection attack, which we've now scrubbed. But it's very unlikely that this will cause harm at this stage. There are several steps between this and hacking the entire instance. (Also FYI for nontechnical users, the hack affected Lemmy logins and nothing else. Web browsers run all websites in a kind of "jail")

Sorry for the inconvenience – growing pains. Updates to come as we learn more!

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[-] [email protected] 0 points 1 year ago

No wonder I couldn't see the posts from here today from my instance. Anyway RC2 is out, which should fix this XSS vulnerability

[-] [email protected] 0 points 1 year ago

Thank you. I was bewildered by the earlier announcement but you have laid it out a lot clearer here.

[-] [email protected] 0 points 1 year ago

I'm sorry if my statement cause you any confusion (シ_ _)シ

[-] [email protected] -1 points 1 year ago

Ah, didn't realize there's a site sticky. Sorry about the other post. Everyone pening dealing with this ig. Sucks to not be on PC.

Still not sure if comments loaded from other instances with custom emoji (the vector of this exploit) can trigger the exploit here, but since we defederated there shouldn't be a way for it to get in, I hope.

this post was submitted on 10 Jul 2023
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