this post was submitted on 10 Jul 2023
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This seems to be the issue, a code injection using custom emojis. Apparently Lemmy is letting some unsanitized data in, which means that Little Bobby Tables strikes again. Somebody was afraid the attackers had seized control of the whole Lemmy network but federation helps hinder the damage here, only individual instances are affected and they'd have to attack each one independently, a single server service would be fully affected in this case.
Beehaw has fully taken down the server as a preventive measure, i imagine they won't be the last ones doing this.
This makes me shudder from my time running forums.
OOB vbulletin was notoriously bad at fending off sql injections, and required CONSTANT monitoring, tweaking, or disabling of basic features to keep the Syrian Liberation Army from pwning an admin account.
Also, and covered in detail, JWT should not be your default for sessions.