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(URGENT) Lemmy has an XSS vulnerability in the sidebar (lemmy.ca)

submitted 1 year ago by [email protected] to c/[email protected]

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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.

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[–] [email protected] 5 points 1 year ago (1 children)

At this point it doesn't seem like community sidebars have the voulnerabilty. We are fairly confident that they have identified the voulnerabilty and that lemmy.ca is safe as long as our admin accounts are properly locked down which we have confirmed.

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

Oh, good! That's excellent then.