Malicious Code Injection in uniform_firefly_z3n: A Threat to npm Packages

uniform_firefly_z3n Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-110123: Malicious code in uniform_firefly_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package 'uniform_firefly_z3n' 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 compromises the integrity of the npm registry.

Vulnerability Detail

The vulnerability in 'uniform_firefly_z3n' originates from its association with a campaign that floods npm with malicious packages. The malicious code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of these variants. This not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages, potentially leading to security breaches in their applications.

How To Fix

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

npm uninstall uniform_firefly_z3n

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 →

Workaround

As a temporary workaround, you can avoid using 'uniform_firefly_z3n' and any packages that may depend on it. Additionally, consider using a tool like Vulert to monitor your project's dependencies for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.

Conclusion

The 'uniform_firefly_z3n' package poses a significant risk due to its malicious code that modifies package configurations and floods the npm registry. It is crucial for developers to remove this package and utilize monitoring tools like Vulert to safeguard their applications against such vulnerabilities.

See every vulnerability recorded for uniform_firefly_z3n →

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FAQ

'uniform_firefly_z3n' is an npm package associated with the tea.xyz token reward campaign, which has been identified to contain malicious code.

The vulnerability can lead to the injection of malicious code into your application, potentially compromising its security and integrity.

You should immediately remove the 'uniform_firefly_z3n' package from your project and monitor for any updates or patches.

Yes, Vulert allows you to monitor and alert for open-source vulnerabilities in your software using just package-lock.json. You can check your application at Vulert Scanner.

Regularly audit your dependencies, use tools like Vulert for real-time monitoring, and stay updated on security advisories for the packages you use.

How To Fix

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

npm uninstall uniform_firefly_z3n

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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