Last night, several Lemmy instances (including lemmy.world) were breached and defaced. More details can be found here: https://lemmy.ml/post/1901079

This breach only affected instances that had custom emoji configured. I hadn't gotten to setting those up yet here, so this instance should not be vulnerable.

A fix for this vulnerability has already been created (https://github.com/LemmyNet/lemmy-ui/pull/1897) and as soon as 0.18.2 is released I will upgrade to it here.