Malicious Code Vulnerability in wulan-42 Package: npm Exploit
Summary
MAL-2025-170568: Malicious code in wulan-42 (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The wulan-42 package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability originates from the wulan-42 package, which includes scripts that modify the package.json file to remove private flags, alter version numbers, and generate random package names. This behavior leads to the continuous republishing of variants, polluting the npm registry and potentially affecting other developers and users relying on legitimate packages. The malicious payload can compromise the security and reliability of applications that depend on this package.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall wulan-42If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, you can avoid using the wulan-42 package and replace it with an alternative package that provides similar functionality without the associated risks. Always verify the integrity and reputation of packages before installation.
Conclusion
The wulan-42 package has been identified as containing malicious code that compromises the integrity of the npm ecosystem. It is crucial for developers to remove this package from their projects and to monitor their dependencies for vulnerabilities. Utilizing tools like Vulert can help maintain the security of your applications.
See every vulnerability recorded for wulan-42 →
FAQ
The wulan-42 package is an npm package associated with the tea.xyz token reward campaign, designed to automatically generate and publish derivative packages.
The malicious code modifies your package.json file, removes private flags, and generates random package names, which can lead to security vulnerabilities and instability in your application.
You should uninstall the wulan-42 package immediately using 'npm uninstall wulan-42' and check your project for any other potentially malicious packages.
You can use tools like Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities in your software.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
