Malicious Code Injection in muy-mutfru-muytio Package - npm Vulnerability
Summary
MAL-2025-161190: Malicious code in muy-mutfru-muytio (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The muy-mutfru-muytio package is part of the npm ecosystem, often utilized in JavaScript applications for various functionalities. However, it has been identified as part of a malicious campaign that floods the npm registry with derivative packages aimed at inflating developer reputation scores for token rewards. This package, like others in the campaign, contains scripts that automate the generation and publication of these malicious packages.
Vulnerability Detail
The vulnerability stems from the presence of malicious code within the muy-mutfru-muytio package. This code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, thereby polluting the npm registry. The origin of this issue is linked to a token reward campaign that exploits npm's publishing capabilities, leading to potential security risks for developers who unknowingly integrate these packages into their projects.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall muy-mutfru-muytioIf 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 avoid using the muy-mutfru-muytio package and any other packages associated with the tea.xyz token reward campaign. Monitor your package-lock.json file for any unauthorized changes and consider using tools like Vulert to keep track of vulnerabilities.
Conclusion
The muy-mutfru-muytio package poses a significant security risk due to its malicious code designed to manipulate npm's publishing system. Developers should take immediate action to remove this package and monitor their dependencies for similar vulnerabilities. Utilizing tools like Vulert can help maintain the security of your projects.
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FAQ
muy-mutfru-muytio is an npm package that has been identified as part of a malicious campaign aimed at inflating developer reputation scores through the publication of derivative packages.
If your project includes the muy-mutfru-muytio package, it may be at risk of being polluted with malicious code, which can lead to security vulnerabilities and potential exploitation.
You should uninstall the muy-mutfru-muytio package immediately using npm uninstall muy-mutfru-muytio and review your project's dependencies for any other potentially malicious packages.
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.
There is no patch for the muy-mutfru-muytio package itself due to its malicious nature. The best course of action is to remove it from your project.
