Malicious Code Injection in upper_antlion_z3n: A Threat to npm Ecosystem
Summary
MAL-2025-97182: Malicious code in upper_antlion_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 upper_antlion_z3n is part of the npm ecosystem, which is widely used for JavaScript package management. It is often utilized in various applications to enhance functionality through third-party libraries. However, this package has been identified as part of a malicious campaign that aims to inflate developer reputation scores through the automated generation and publication of derivative packages, leading to potential security risks.
Vulnerability Detail
The vulnerability in upper_antlion_z3n stems from its association with a malicious campaign that modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior not only pollutes the npm registry but also poses a risk of unintentional dependency on compromised packages, which can lead to further exploitation and security breaches.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall upper_antlion_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 measure, you can avoid using upper_antlion_z3n and any packages that depend on it. Additionally, you can monitor your package dependencies using tools like Vulert, which can alert you to vulnerabilities in real-time. 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 upper_antlion_z3n package poses a significant security risk due to its malicious behavior aimed at manipulating the npm registry. It is crucial for developers to be vigilant about their dependencies and utilize tools like Vulert to monitor for vulnerabilities. Immediate action should be taken to remove this package from any projects to safeguard against potential threats.
See every vulnerability recorded for upper_antlion_z3n →
FAQ
upper_antlion_z3n is an npm package that has been identified as part of a malicious campaign aimed at inflating developer reputation scores.
This vulnerability can lead to the unintentional inclusion of malicious code in your application, potentially compromising its security and integrity.
You should uninstall the package immediately using 'npm uninstall upper_antlion_z3n' and review your dependencies for any other potentially compromised packages.
Yes, you can use tools like Vulert to monitor your dependencies for vulnerabilities in real-time and ensure that you are using trusted packages.
There is no patch available for upper_antlion_z3n as it is a malicious package. The best course of action is to remove it from your project.
