Malicious Code Injection in crowded_worm_z3n Package - npm Vulnerability
Summary
MAL-2025-101101: Malicious code in crowded_worm_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The crowded_worm_z3n package is part of a series of malicious packages that emerged during the tea.xyz token reward campaign. These packages are designed to inflate developer reputation scores by automatically generating and publishing derivative packages with randomized names. The primary functionality of this package is to serve as a tool for developers, but its malicious nature compromises the integrity of the npm ecosystem.
Vulnerability Detail
The vulnerability in the crowded_worm_z3n package arises from its inclusion in a malicious campaign that floods the npm registry with harmful packages. The malicious payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior leads to the pollution of the npm registry and can potentially harm developers by affecting their reputation and the reliability of their dependencies.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall crowded_worm_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, consider using a package-lock.json file to monitor your dependencies. This file helps in identifying and locking the versions of packages used in your project, thereby preventing the installation of malicious packages. You can also utilize tools like Vulert to monitor for vulnerabilities in real-time without requiring code access or installation.
Conclusion
The crowded_worm_z3n package poses a significant threat to the npm ecosystem due to its malicious behavior of flooding the registry with harmful packages. It is crucial for developers to be vigilant, remove affected packages, and utilize monitoring tools to safeguard their projects from such vulnerabilities.
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FAQ
crowded_worm_z3n is a malicious npm package that is part of a campaign to inflate developer reputation scores by flooding the npm registry with harmful packages.
This vulnerability can lead to the pollution of the npm registry, potentially harming your project's integrity and affecting your reputation as a developer.
You should uninstall the crowded_worm_z3n package immediately and check for any other affected packages in your project.
Yes, using a package-lock.json file and monitoring tools like Vulert can help you track and manage vulnerabilities in your dependencies.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
