There have been users spamming CSAM content in !lemmyshitpost@lemmy.world causing it to federate to other instances. If your instance is subscribed to this community, you should take action to rectify it immediately. I recommend performing a hard delete via command line on the server.
I deleted every image from the past 24 hours personally, using the following command: sudo find /srv/lemmy/example.com/volumes/pictrs/files -type f -ctime -1 -exec shred {} \;
Note: Your local jurisdiction may impose a duty to report or other obligations. Check with these, but always prioritize ensuring that the content does not continue to be served.
Update
Apparently the Lemmy Shitpost community is shut down as of now.
What’s a CSAM attack? Sounds so serious, but I’ve never heard of it.
Spamming pornographic depictions of minors
It is where scum spam a site with illegal images, which can result in the site being taken down and in some instances the site owners being prosecuted.
Depending on where you live you may have a legal obligation to report the incidents and to prove actions taken to remove the content.
related in the US: safe harbor laws