15.3 specifically for Minecraft version . While that specific release candidate version is older, you can typically find it through official Wurst channels. Please be careful when downloading Minecraft clients, as using third-party mirrors can sometimes be risky. Where to find it safely:
The safest place to download any version is directly from the Wurst Client Download Page . You can browse their "All Downloads" or "Versions" section to find specific legacy builds like v7.15.3. Download Wurst v7.15.3 MC1.17.1-rc2File: Wurst-...
Wurst v7.x requires the Fabric Loader and the Fabric API . Make sure you have those installed for Minecraft 1.17.1-rc2 before adding the Wurst .jar file to your mods folder. Where to find it safely: The safest place
You can also check the Wurst7 GitHub Releases to find historical versions and their source code. Make sure you have those installed for Minecraft 1