Critical Malicious Code Vulnerability in themeone-utils Package

themeone-utils Updated 02 Oct 2025

Summary

15/07/2025
CRITICAL
No i
Critical
Not published

MAL-2025-5962: Malicious code in themeone-utils (npm). Affects themeone-utils versions 71.71.71 – 71.71.73. No fix is published. How to fix ↓

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Background

The themeone-utils package is a utility library designed for use in Node.js applications, providing various functions to enhance theme management. However, it has been identified to contain malicious code that compromises the security of any system where it is installed. This vulnerability poses a significant risk to developers and organizations relying on this package for their projects.

Vulnerability Detail

The vulnerability originates from the inclusion of embedded malicious code within the themeone-utils package. This code can lead to full system compromise, allowing unauthorized access to sensitive information such as secrets and keys stored on the affected computer. The malicious nature of this code is classified under CWE-506, indicating that it appears to be intentionally harmful. Users are advised to treat any system with this package installed as fully compromised.

How To Fix

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

npm uninstall themeone-utils

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary measure, you can prevent the execution of the malicious code by isolating the affected application from the internet and restricting access to sensitive data. However, the best course of action is to remove the package entirely.

Conclusion

The themeone-utils package contains embedded malicious code that poses a severe security risk. Users are strongly advised to remove the package immediately and monitor their systems for any signs of compromise. Utilizing tools like Vulert can help in identifying vulnerabilities in your applications.

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FAQ

Immediately remove the themeone-utils package from your project and consider rotating any sensitive information stored on the affected system.

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.

Currently, there is no patched version available. Users should remove the package until a secure version is released.

Failing to address this vulnerability can lead to unauthorized access to sensitive data, system compromise, and potential data breaches.

Yes, consider looking for alternative packages that provide similar functionality without the associated risks.

How To Fix

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

npm uninstall themeone-utils

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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