Malicious Code Injection in modirai-fuhopia-jasu Package
Summary
MAL-2025-160621: Malicious code in modirai-fuhopia-jasu (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The modirai-fuhopia-jasu package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that modifies package configurations and floods the npm registry with unwanted variants.
Vulnerability Detail
The vulnerability originates from a malicious payload embedded within the modirai-fuhopia-jasu package. This payload alters the package.json file by removing private flags, changing version numbers, and generating random package names. The intent is to continuously republish these variants, which pollutes the npm registry and can lead to reputational damage for developers and potential security risks for users who inadvertently install these compromised packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall modirai-fuhopia-jasuIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, avoid using the modirai-fuhopia-jasu package and monitor your project for any dependencies that may have been affected by this malicious code. You can also use tools like Vulert to check for vulnerabilities in your package-lock.json file.
Conclusion
The modirai-fuhopia-jasu package has been identified as containing malicious code that poses significant risks to developers and users. It is crucial to remove this package from your projects and monitor for any related vulnerabilities using tools like Vulert.
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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 malicious code modifies your package.json file, removes private flags, and floods the npm registry with unwanted package variants, which can lead to security risks.
You should uninstall the modirai-fuhopia-jasu package immediately using the command: npm uninstall modirai-fuhopia-jasu.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software without requiring code access or installation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
