Malicious Code Injection in mutaus-mansis-saintrasse Package - npm Vulnerability

mutaus-mansis-saintrasse Updated 26 Nov 2025

Summary

12/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-161103: Malicious code in mutaus-mansis-saintrasse (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The mutaus-mansis-saintrasse package is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to exploit npm's publishing system. It is designed to generate and publish derivative packages with randomized names, thereby inflating developer reputation scores for token rewards. The vulnerability stems from the package's ability to modify critical files, such as package.json, leading to potential security risks.

Vulnerability Detail

The vulnerability in the mutaus-mansis-saintrasse package originates from its association with the tea.xyz token reward campaign. The package contains scripts that automatically publish variants of itself with altered names and modified package.json files. This behavior can lead to the removal of private flags, changes in version numbers, and the continuous republishing of these malicious packages, which pollutes the npm registry. The ramifications include compromised developer accounts, unauthorized access to sensitive information, and a degraded reputation for legitimate packages.

How To Fix

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

npm uninstall mutaus-mansis-saintrasse

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 restrict the use of this package by implementing strict version control in your package.json file. Ensure that you do not allow the installation of any versions of mutaus-mansis-saintrasse by specifying it in your package.json as follows: "mutaus-mansis-saintrasse": "<0.0.1".

Conclusion

The mutaus-mansis-saintrasse package poses a significant security risk due to its malicious behavior of modifying and republishing packages. It is essential to take immediate action by uninstalling the package and monitoring your project for any unauthorized changes. Utilizing tools like Vulert can help maintain the security of your software in the long run.

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FAQ

The mutaus-mansis-saintrasse package is an npm package that has been identified as part of a malicious campaign aimed at exploiting the npm registry.

This vulnerability can lead to unauthorized modifications of your project's package.json file, potentially compromising your application's security and integrity.

You should uninstall the mutaus-mansis-saintrasse package immediately and monitor your project for any unauthorized changes.

Yes, you can use Vulert, which monitors and alerts you in real-time for open-source vulnerabilities in your software using just package-lock.json. You can check your application for vulnerabilities using the Vulert playground without any signup.

Regularly audit your dependencies, use tools like Vulert for real-time monitoring, and stay informed about known vulnerabilities in the packages you use.

How To Fix

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

npm uninstall mutaus-mansis-saintrasse

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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