Malicious Code Vulnerability in musasiak-butsd-fa Package

musasiak-butsd-fa Updated 26 Nov 2025

Summary

12/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-161003: Malicious code in musasiak-butsd-fa (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The musasiak-butsd-fa package is part of the npm ecosystem, often utilized in JavaScript applications. It is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with various packages. This package, like others in the campaign, is designed to manipulate developer reputation scores through the automatic generation and publication of derivative packages.

Vulnerability Detail

The vulnerability in the musasiak-butsd-fa package stems from its inclusion in a malicious campaign that deploys autopublish scripts. These scripts modify the package.json file by removing private flags, altering version numbers, and generating random package names, which leads to the pollution of the npm registry. The malicious behavior can compromise the integrity of applications relying on this package, potentially introducing security risks and instability.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall musasiak-butsd-fa

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

As a temporary workaround, you can remove the musasiak-butsd-fa package from your project by executing: npm uninstall musasiak-butsd-fa. This will prevent any malicious code from executing while you assess alternative packages or wait for a secure update.

Conclusion

The musasiak-butsd-fa package contains a serious vulnerability due to its association with a malicious campaign aimed at manipulating npm registry entries. It is crucial for developers to take immediate action by updating or removing the package to ensure the security of their applications.

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FAQ

musasiak-butsd-fa is an npm package associated with the tea.xyz token reward campaign, known for flooding the npm registry with malicious packages.

The vulnerability can lead to the introduction of malicious code, compromising the integrity and security of your application.

You should immediately update the package to the latest secure version or remove it from your project to mitigate risks.

You can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time without requiring code access.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall musasiak-butsd-fa

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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