Malicious Code Injection in utomo-jamblang18-riris Package

utomo-jamblang18-riris Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-91572: Malicious code in utomo-jamblang18-riris (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The utomo-jamblang18-riris package is part of the npm ecosystem, often utilized for various JavaScript applications. It is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with numerous packages. This package, like others in the campaign, is designed to manipulate npm's publishing system, potentially affecting developers' reputations and the integrity of the npm registry.

Vulnerability Detail

The vulnerability in the utomo-jamblang18-riris package stems from malicious code that modifies the package.json file. This code removes private flags, alters version numbers, and generates random package names, leading to the automatic publication of derivative packages. The origin of this vulnerability is linked to the tea.xyz token reward campaign, which aims to inflate developer reputation scores by flooding the npm registry with these malicious packages. The ramifications include pollution of the npm registry and potential security risks for applications relying on this package.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall utomo-jamblang18-riris

If 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 utomo-jamblang18-riris package altogether and look for alternative packages that provide similar functionality without the associated risks.

Conclusion

The utomo-jamblang18-riris package poses a significant security risk due to its malicious code that alters package metadata and floods the npm registry. Immediate action is required to remove this package and safeguard your project. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in the future.

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FAQ

It is an npm package associated with the tea.xyz token reward campaign, known for containing malicious code.

The malicious code modifies your package.json file, potentially leading to the automatic publication of harmful derivative packages.

You should uninstall the package immediately and monitor your project for any unusual activity.

Yes, Vulert can monitor your project for open-source vulnerabilities using just the package-lock.json file, providing real-time alerts.

You can use the Vulert playground at Vulert Scanner to check if your application is affected without needing to sign up.

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How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall utomo-jamblang18-riris

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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