Malicious Code Detected in funout Package - Security Alert

funout Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-21056: Malicious code in funout (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The funout package is an npm library designed for various functionalities within JavaScript applications. It is widely used for its ease of integration and utility. However, recent findings have revealed that this package contains malicious code, posing a significant threat to applications utilizing it.

Vulnerability Detail

The vulnerability in the funout package stems from the inclusion of malicious code that can compromise the security of applications. This code may lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The issue was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action.

How To Fix

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

npm uninstall funout

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 measure, consider removing the funout package from your project until a secure version is released. You can do this by executing the command: npm uninstall funout.

Conclusion

The discovery of malicious code in the funout package highlights the importance of maintaining vigilance in software dependencies. Users are urged to update or remove the package to safeguard their applications from potential threats.

See every vulnerability recorded for funout →

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FAQ

Funout is an npm package used in JavaScript applications for various functionalities, but it has recently been found to contain malicious code.

The malicious code in the funout package was identified by security researchers from Amazon Inspector.

Using the funout package can lead to unauthorized access, data breaches, and other security vulnerabilities in your application.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without needing to sign up.

If you cannot update the package right away, consider removing it from your project as a temporary workaround until a secure version is available.

How To Fix

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

npm uninstall funout

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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