Malicious Code Injection in wee_cephalopod_z3n Package
Summary
MAL-2025-97336: Malicious code in wee_cephalopod_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The wee_cephalopod_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 originates from the package's 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, polluting the npm registry and potentially affecting other developers by inflating their package counts and reputation scores. The malicious scripts included in the package (auto.js, autopublish.js, etc.) automate these harmful actions.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall wee_cephalopod_z3nIf 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 wee_cephalopod_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner.
Conclusion
The wee_cephalopod_z3n package has been identified as containing malicious code that compromises the integrity of the npm ecosystem. It is essential to uninstall this package and monitor your projects for vulnerabilities using tools like Vulert to ensure the security of your applications.
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FAQ
wee_cephalopod_z3n is an npm package associated with the tea.xyz token reward campaign, designed to automate the generation and publication of derivative packages.
The malicious code modifies your package.json file, removes private flags, and generates random package names, which can lead to reputation inflation and pollution of the npm registry.
You should uninstall the wee_cephalopod_z3n package immediately using 'npm uninstall wee_cephalopod_z3n' and check for any alternative packages.
You can use Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities. Visit https://vulert.com for more information.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
