Malicious Code Injection in surprised_fox_z3n: A Threat to npm Packages
Summary
MAL-2025-90808: Malicious code in surprised_fox_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package 'surprised_fox_z3n' is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to generate and publish derivative packages with randomized names, which can inflate developer reputation scores for token rewards. Its primary functionality revolves around automating the publication process, but it has been compromised to include malicious scripts.
Vulnerability Detail
The vulnerability in 'surprised_fox_z3n' originates from its association with a malicious campaign that modifies the package.json file by removing private flags and changing version numbers. It generates random package names and continuously republishes variants to pollute the npm registry. This can lead to security risks, including the potential for users to inadvertently install compromised packages, which could execute harmful code in their applications.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall surprised_fox_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 'surprised_fox_z3n' package and look for alternative packages that provide similar functionality without the associated risks. Additionally, you can monitor your package dependencies using tools like Vulert, which checks for vulnerabilities in your package-lock.json file.
Conclusion
The 'surprised_fox_z3n' package poses a significant security risk due to its malicious code that modifies package metadata and repackages itself. It is essential for developers to remove this package and monitor their dependencies for vulnerabilities to maintain the integrity of their applications.
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FAQ
It is an npm package that is part of a malicious campaign aimed at inflating developer reputation scores through automated publishing of derivative packages.
If you have the 'surprised_fox_z3n' package installed, your application may be at risk of executing malicious code, which can compromise security and stability.
You should uninstall the package immediately and check for any other dependencies that may be affected by similar vulnerabilities.
You can use tools like Vulert, which allows you to monitor and alert for open-source vulnerabilities in real-time using your package-lock.json file.
Yes, you can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without requiring any signup.
