Critical Malicious Code Vulnerability in funforday Package

funforday Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-21052: Malicious code in funforday (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The funforday package is an npm library designed for various utility functions that enhance JavaScript applications. It is widely used in the Node.js ecosystem for its ease of integration and functionality. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability stems from the inclusion of malicious code within the funforday package. This code can potentially compromise the security of applications, leading to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for developers to address this vulnerability immediately.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall funforday

If 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 funforday package altogether and look for alternative packages that provide similar functionality without the associated risks.

Conclusion

The funforday package has been identified as containing malicious code, posing serious security risks to applications that utilize it. Immediate action is required to uninstall the package and seek alternatives. Utilizing tools like Vulert can help monitor for such vulnerabilities in the future.

See every vulnerability recorded for funforday →

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FAQ

funforday is an npm package that offers utility functions for JavaScript applications, but it has been found to contain malicious code.

You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.

You should uninstall the funforday package immediately and look for alternative solutions to avoid security risks.

Currently, there is no patched version available. It is recommended to uninstall the package until a secure version is released.

Vulert uses package-lock.json to monitor and alert in real-time for open-source vulnerabilities, helping developers maintain secure applications.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall funforday

If 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 →

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