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PSA: Lemmy.world has been compromised!
(lemmy.ml)
A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
It does look like most instances will be vulnerable judging by the fix. It's not custom code; it's in lemmy-ui proper.
https://github.com/LemmyNet/lemmy-ui/pull/1897/files