Malicious Code Injection in mobile_horse_z3n Package
Summary
MAL-2025-105922: Malicious code in mobile_horse_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The mobile_horse_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development of applications by providing reusable code. However, it has been identified as part of a malicious campaign that floods the npm registry with harmful packages designed to manipulate developer reputation scores through automated publishing scripts.
Vulnerability Detail
The vulnerability in the mobile_horse_z3n package stems from its association with a malicious campaign that modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior is intended to inflate developer reputation scores and pollute the npm registry with derivative packages. The malicious payload can lead to the unintentional installation of harmful code in applications that depend on this package, potentially compromising security and functionality.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall mobile_horse_z3nIf 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 prevent the installation of this package by using npm's package-lock.json file to lock down dependencies. Ensure that your project does not include mobile_horse_z3n or any of its derivatives. Regularly audit your dependencies using tools like npm audit to identify and mitigate vulnerabilities.
Conclusion
The mobile_horse_z3n package poses a significant risk due to its malicious code injection capabilities. It is crucial for developers to be vigilant about their dependencies and take immediate action to remove any affected packages. Utilizing tools like Vulert can help maintain the security of your applications by providing real-time vulnerability alerts.
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FAQ
The mobile_horse_z3n package is an npm package that has been identified as part of a malicious campaign to manipulate developer reputation scores.
If your application depends on the mobile_horse_z3n package, it may inadvertently execute malicious code, compromising security and functionality.
You should uninstall the mobile_horse_z3n package immediately and check your package-lock.json file for any references to it.
You can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time without requiring code access or installation.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without signing up.
