Malicious Code Injection in casual_limpet_z3n Package
Summary
MAL-2025-93476: Malicious code in casual_limpet_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 casual_limpet_z3n package 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 the casual_limpet_z3n package originates from its malicious payload, which modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior leads to the continuous republishing of variants, effectively polluting the npm registry and potentially impacting other developers by inflating reputation scores fraudulently. The malicious code is part of a broader scheme to exploit the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall casual_limpet_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 prevent the installation of this package by adding it to your project's .npmrc file with the following line: 'package-lock=false'. This will help avoid the automatic installation of potentially harmful packages.
Conclusion
The casual_limpet_z3n package poses a significant risk due to its malicious code that alters package metadata and pollutes the npm registry. It is crucial for developers to remove this package from their projects and monitor for any updates or patches. Utilizing tools like Vulert can help in identifying vulnerabilities in real-time.
See every vulnerability recorded for casual_limpet_z3n →
FAQ
casual_limpet_z3n is an npm package associated with the tea.xyz token reward campaign, designed to generate and publish derivative packages.
The vulnerability can lead to the pollution of the npm registry, affecting the integrity of package management and potentially introducing malicious code into your project.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit the Vulert playground at Vulert Scanner to check your application without any signup.
Currently, there is no specific patch for the casual_limpet_z3n package. The recommended action is to uninstall the package and monitor for any updates.
If you have installed the casual_limpet_z3n package, you should uninstall it immediately using the command 'npm uninstall casual_limpet_z3n' to mitigate any potential risks.
