Malicious Code Injection in wulan-12 Package: A Threat to npm Ecosystem
Summary
MAL-2025-170536: Malicious code in wulan-12 (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The wulan-12 package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate development by providing reusable code. However, it has been identified as part of a malicious campaign that aims to manipulate the npm registry and inflate developer reputation scores through the automatic generation of derivative packages.
Vulnerability Detail
The vulnerability in the wulan-12 package stems from its association with a malicious campaign that modifies the package.json file to remove private flags and change version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This not only compromises the integrity of the npm ecosystem but also poses risks to developers who may unknowingly use these tainted packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall wulan-12If 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 wulan-12 package and look for alternative packages that provide similar functionality without the associated risks. Always verify the integrity and reputation of packages before including them in your project.
Conclusion
The wulan-12 package poses a significant threat to the npm ecosystem due to its malicious code injection capabilities. It is crucial for developers to remain vigilant, regularly update their dependencies, and utilize tools like Vulert to monitor for vulnerabilities to ensure the security of their applications.
See every vulnerability recorded for wulan-12 →
FAQ
The wulan-12 package is an npm package that has been identified as part of a malicious campaign aimed at manipulating the npm registry.
The vulnerability can lead to the introduction of malicious code into your project, compromising its security and integrity.
You should uninstall the wulan-12 package immediately using 'npm uninstall wulan-12' and review your project's dependencies 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.
