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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] 2 points 1 year ago (1 children)

Beehaw completely shut down as a response

[–] [email protected] 5 points 1 year ago

While I respect their decision, I believe that's a over-reaction at this point and we will not be doing that, yet.