Critical Malicious Code Vulnerability in euuoon Package

euuoon Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-19917: Malicious code in euuoon (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The euuoon package is an npm library designed for various functionalities within JavaScript applications. It is widely used for its ease of integration and utility in enhancing application performance. However, it has been identified to contain malicious code that poses significant security risks to applications utilizing this package.

Vulnerability Detail

The euuoon package has been found to harbor malicious code that can compromise the security of applications using it. This vulnerability originated from the package itself, which was introduced in version 0 and has not been addressed. The ramifications of this vulnerability include potential data breaches, unauthorized access to sensitive information, and exploitation of the affected systems by malicious actors.

How To Fix

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

npm uninstall euuoon

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 remove the euuoon package from your project dependencies until a secure version is released. Use the following command to uninstall the package: npm uninstall euuoon.

Conclusion

The euuoon package has been identified as containing malicious code that poses significant security risks. It is crucial for developers to remove this package from their projects and monitor for any updates. Utilizing tools like Vulert can help in identifying vulnerabilities in your applications.

See every vulnerability recorded for euuoon →

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FAQ

The euuoon package is an npm library used in JavaScript applications for various functionalities, but it has been identified to contain malicious code.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application against the vulnerability using the Vulert playground at Vulert Scanner.

The risks include potential data breaches, unauthorized access to sensitive information, and exploitation of the affected systems by malicious actors.

As of now, there is no patched version available. It is recommended to remove the package until a secure version is released.

You should uninstall the euuoon package immediately and monitor for any updates or patches that may address the vulnerability.

How To Fix

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

npm uninstall euuoon

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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