How do I install ServerPatches?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does ServerPatches work with?

The listing gives Minecraft 1.21, 1.21.1, 1.21.2, among others. This is the version stated by the author or source site, not something we verified ourselves.

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ServerPatches

by Summiner · on Modrinth

ServerPatches simply fixes crashes and other important exploits for older minecraft versions since paper doesn't have backwards compatibility. For…

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Paper2 builds
Mod loader Bukkit1 build
Mod loader Purpur1 build
Mod loader Spigot1 build

Minecraft version

Minecraft 1.21–1.21.5Newest
Minecraft 1.17.1–1.20.4

Minecraft 1.21–1.21.5Newest

Minecraft 1.21–1.21.5Newest

Minecraft 1.21–1.21.5Newest

⬇ Download for 1.21–1.21.5 · Paper ⬇ Download for 1.17.1–1.20.4 · Paper ⬇ Download for 1.21–1.21.5 · Bukkit ⬇ Download for 1.21–1.21.5 · Purpur ⬇ Download for 1.21–1.21.5 · Spigot

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

ServerPatches

ServerPatches simply fixes crashes and other important exploits for older minecraft versions since paper doesn't have backwards compatibility. For 1.17-1.20+

Features:

Fixes the lectern exploit - EXAMPLE
Fixes out of bounds inventory click packets - EXAMPLE
Fixes out of bounds button integers for inventory slot swap packets - EXAMPLE N/A
Fixed data command exploits with invalid NBT, Caused by a paper patch breaking something

Credits:

Paper - Amazing community & Reference for multiple crash fixes
PacketEvents - Amazing library we use to handle packets
Boosted-Yaml - Cool library we use for configuration stuff

Notes:

If you know of any other exploits please open a new issue and give detail about the exploit
In the provided examples under Features we do not directly or indirectly endorse the people who have made the videos/posts, they are simply to demonstrate the exploit

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21, 1.21.1, 1.21.2
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

Verified by MCModsHub

Ships as ServerPatches-Paper.jar — drop this file into the mods folder
Download size: 3.4 MB
Download link checked 30 Aug 2026 — working

These come from our own check of the pack file, not from the source page.

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