this post was submitted on 10 Jul 2023
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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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[–] j_roby 8 points 1 year ago (1 children)

I just saw this on my feed. It's above my pay grade, but seemed urgent enough to cross post here

[–] j_roby 4 points 1 year ago
[–] poVoq 5 points 1 year ago

I applied the mitigations and unvalidated all login tokens.

As far as I can tell slrpnk.net was not directly effected though.