Malicious Code Injection in precise_mule_z3n: A Threat to npm Ecosystem
Summary
MAL-2025-89495: Malicious code in precise_mule_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package precise_mule_z3n is part of the npm ecosystem, which is widely used for JavaScript package management. This package is associated with the tea.xyz token reward campaign, which has been linked to the proliferation of malicious packages designed to inflate developer reputation scores. The functionality of this package is compromised due to its malicious intent, which can lead to severe consequences for developers and users relying on npm for secure package management.
Vulnerability Detail
The vulnerability in precise_mule_z3n stems from its malicious code that modifies the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior is intended to create derivative packages that pollute the npm registry, making it difficult for developers to find legitimate packages. The origin of this vulnerability is traced back to the tea.xyz token reward campaign, which exploits npm's package management system for fraudulent gains.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall precise_mule_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you can avoid using the precise_mule_z3n package and replace it with a trusted alternative. Additionally, regularly audit your npm packages using the command npm audit to identify and address vulnerabilities in your dependencies.
Conclusion
The precise_mule_z3n package poses a significant threat to the npm ecosystem due to its malicious code that alters package metadata and floods the registry with illegitimate packages. It is crucial for developers to remain vigilant, regularly audit their dependencies, and utilize tools like Vulert to safeguard their projects from such vulnerabilities.
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FAQ
precise_mule_z3n is an npm package that has been identified as malicious, associated with a campaign to inflate developer reputation scores through the creation of derivative packages.
The vulnerability can lead to the pollution of the npm registry, making it harder to find legitimate packages and potentially introducing security risks into your project.
You should immediately uninstall the precise_mule_z3n package and check your project for any other malicious packages that may have been installed as a result.
You can use tools like Vulert, which monitors and alerts you in real-time for open-source vulnerabilities in your software by analyzing your package-lock.json file.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
