Malicious Code Injection in flat_unicorn_z3n: A Threat to npm Ecosystem
Summary
MAL-2025-102817: Malicious code in flat_unicorn_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The package flat_unicorn_z3n 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 aims to manipulate the npm registry and inflate developer reputation scores through the creation of derivative packages.
Vulnerability Detail
The vulnerability in flat_unicorn_z3n originates from its association with a malicious campaign linked to the tea.xyz token reward system. This package contains scripts designed to automatically generate and publish numerous derivative packages with randomized names, effectively polluting the npm registry. The malicious payload modifies the package.json file by removing private flags, altering version numbers, and continuously republishing variants, which can lead to significant reputational damage for developers and compromise the integrity of the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall flat_unicorn_z3nIf 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 the flat_unicorn_z3n package and replace it with a trusted alternative. Always verify the source and integrity of packages before including them in your project.
Conclusion
The flat_unicorn_z3n package poses a significant threat to the npm ecosystem due to its malicious intent to manipulate the registry and inflate developer reputation scores. It is crucial for developers to remain vigilant, regularly audit their dependencies, and utilize tools like Vulert to monitor for vulnerabilities.
See every vulnerability recorded for flat_unicorn_z3n →
FAQ
flat_unicorn_z3n is an npm package that has been identified as part of a malicious campaign to manipulate the npm registry.
The vulnerability can lead to the pollution of the npm registry, potentially damaging your project's reputation and introducing security risks.
You should uninstall the package immediately using 'npm uninstall flat_unicorn_z3n' and check for any other affected packages.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file. You can also check your application against known vulnerabilities using the Vulert playground.
No, there is no patch available for flat_unicorn_z3n as it is a malicious package. The best course of action is to remove it from your project.
