Malicious Code Injection in mulyono-rujak7-apidev Package

mulyono-rujak7-apidev Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-88523: Malicious code in mulyono-rujak7-apidev (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The mulyono-rujak7-apidev package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. It is designed to facilitate the generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, this package has been identified as malicious due to its ability to modify package.json files and republish variants, leading to potential pollution of the npm registry.

Vulnerability Detail

The vulnerability originates from the package's malicious payload, which alters the package.json file by removing private flags and changing version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants. This behavior not only compromises the integrity of the npm registry but also poses risks to developers who may unknowingly use these compromised packages, leading to security vulnerabilities in their applications.

How To Fix

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

npm uninstall mulyono-rujak7-apidev

If 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 mulyono-rujak7-apidev package and instead look for alternative packages that provide similar functionality without the associated risks. Additionally, you can monitor your package-lock.json file for any unauthorized changes.

Conclusion

The mulyono-rujak7-apidev package has been identified as malicious, posing significant risks to developers and the integrity of the npm registry. It is crucial to remove this package and monitor your dependencies for vulnerabilities to ensure the security of your applications.

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FAQ

It is an npm package associated with the tea.xyz token reward campaign, designed to generate and publish derivative packages.

The vulnerability can lead to the pollution of the npm registry and may introduce security risks if compromised packages are used in your project.

You should remove the mulyono-rujak7-apidev package from your project and monitor for any updates or patches.

You can use tools like Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities.

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

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

How To Fix

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

npm uninstall mulyono-rujak7-apidev

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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