Urgent: Fix Log4J vulnerability

Operating System

No response

Description of bug

See https://www.minecraft.net/en-us/article/important-message--security-vulnerability-java-edition for more information

Steps to reproduce

N/A

Suspected cause

N/A

This issue is unique

• I have searched the issue tracker and did not find an issue describing my bug.

[phit]

There's been a big security issue with the log4j library used by Minecraft, allowing remote code execution.

This has been fully fixed in MultiMC. All versions with all mod loaders should be safe.Please, restart your Multimc and game to apply fixes.

MultiMC update is not required for the fix.

This required updating the log4j libraries in all versions of Minecraft, so it's possible some versions are now broken. Please report crashes involving log4j in #help https://discord.gg/multimc