Description
CFX is a Fabric mod for Minecraft 1.14 to 1.21.4 that patches hazardous exploits.
Why?
For almost a decade now, Minecraft exploiting has become increasingly common and increasingly dangerous. While Mojang has been making a commendable effort to combat this by patching exploits in their game with updates, they don't support older, more vulnerable versions of the game. For most people, this isn't a problem, because all they need to do to stay protected is to use the latest and greatest version of Minecraft. However, some people simply can't do that for one reason or another (such as running older hardware or using mods that don't support later versions of the game).
So, this is where CFX steps in. It tries to patch some of the more hazardous exploits for all mainline versions of the game, even the versions that were superseded by minor updates (e.g. 1.14, 1.14.1, 1.15.1, etc). That way, almost everybody can be protected. It works standalone so you don't have to use it as part of a bigger package of mods.
Patch Coverage
This timeline details what patches are available for which exploits.

⚠️: Currently only partially patched in some places. Contributions are welcome to make them complete.
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What means Verified?
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Compatibility: The mod should be compatible with the latest version of Minecraft and be clearly labeled with its supported versions.
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Functionality: The mod should work as advertised and not cause any game-breaking bugs or crashes.
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Security: The mod should not contain any malicious code or attempts to steal personal information.
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Performance: The mod should not cause a significant decrease in the game's performance, such as by causing lag or reducing frame rates.
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Originality: The mod should be original and not a copy of someone else's work.
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Up-to-date: The mod should be regularly updated to fix bugs, improve performance, and maintain compatibility with the latest version of Minecraft.
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Support: The mod should have an active developer who provides support and troubleshooting assistance to users.
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License: The mod should be released under a clear and open source license that allows others to use, modify, and redistribute the code.
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Documentation: The mod should come with clear and detailed documentation on how to install and use it.
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How to Install
Download Forge & Java
Download Forge from the offical Site or here. If you dont have Java installed then install it now from here. After Downloading Forge you can run the file with Java.
Prepare
Lounch Minecraft and select your Forge istallation as Version this will create a Folder called Mods.
Add Mods
Type Win+R and type %appdata% and open the .minecraft Folder. There will you find your Folder called Mods. Place all Mods you want to play in this Folder
Enjoy
You are now Ready. Re-start your Game and start Playing.