Malicious Code Injection in mature_possum-silentdev Package
Summary
MAL-2025-105671: Malicious code in mature_possum-silentdev (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The mature_possum-silentdev package is part of the npm ecosystem, which is widely used for JavaScript package management. This package is believed to be associated with a token reward campaign that has led to the proliferation of malicious packages on npm. Its primary function is to facilitate the development and distribution of JavaScript applications, but it has been compromised to include harmful scripts that manipulate package metadata.
Vulnerability Detail
The vulnerability in the mature_possum-silentdev package stems from its association with a malicious campaign that aims to inflate developer reputation scores through the automatic generation and publication of derivative packages. The malicious code modifies the package.json file by removing private flags, altering version numbers, and creating random package names. This leads to pollution of the npm registry and can potentially compromise the integrity of applications relying on this package.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall mature_possum-silentdevIf 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 remove the mature_possum-silentdev package from your project by executing: npm uninstall mature_possum-silentdev. This will prevent the execution of any malicious code until a secure version is available.
Conclusion
The mature_possum-silentdev package has been identified as containing malicious code that poses a significant risk to applications using it. It is crucial to take immediate action by updating or removing the package and monitoring your project for vulnerabilities using tools like Vulert.
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FAQ
It is an npm package used in JavaScript development, but it has been compromised to include malicious code.
The malicious code modifies package metadata, which can lead to the pollution of the npm registry and potential security risks for your application.
You should uninstall the package immediately and check for any updates or patches that may be available.
Yes, you can use Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time without needing to access your code.
You can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without any signup.
