4chan
4chan has been hacked.
the process
Evidently, some hacker had access to root on 4chan's servers since 2021 and planned the hack for a few years. How it was done:
what to do
Commentary from our friends in the east:
gallery
Oh well, despite the fact that people are crying about it and saying "this is the end," 4chan will probably be back in a few hours. Reminder: you are here forever.
Jannie ban portal.
The last post?
The hacker brought /qa/ back to gloat.
Trolling Hiroshi
Board stats.
4chan pass users are safe.
Hotpocket Helper
Jannies didn't like being called jannies.
stuff
So 4chan very likely got hacked because they were running on an extremely out of date version of PHP that has a lot of vulnerabilities and exploits and are using deprecated function to interact with there MySQL database. Web security 101: Keep your code and software up to date. 
- 7zip of the source files
- List of mods and jannies in .txt format.
- Dump of the jannies private IRC channel
- Dump of the entire /j/ board (a board private only to board jannies)
- File tree.
- Autodoxxed jannies/mods/admin in JSON.