Critical Malicious Code Vulnerability in buc-utils Package

buc-utils Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16248: Malicious code in buc-utils (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The buc-utils package is a utility library designed for Node.js applications, providing various functions to enhance development efficiency. However, it has been identified to contain malicious code, posing significant security risks to applications that utilize it. This vulnerability can lead to unauthorized access or data breaches, making it crucial for developers to address it promptly.

Vulnerability Detail

The vulnerability in the buc-utils package stems from the inclusion of malicious code that can execute harmful actions within the user's environment. This code was introduced in version 0 and can compromise the security of applications that depend on this package. The ramifications include potential data theft, unauthorized access to sensitive information, and the possibility of the affected application being used as a vector for further attacks.

How To Fix

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

npm uninstall buc-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, consider removing the buc-utils package from your project until a secure version is released. You can do this by running the following command: npm uninstall buc-utils. This will prevent any potential exploitation of the malicious code while you seek alternatives.

Conclusion

The buc-utils package has been identified to contain malicious code, posing a significant security risk to applications that utilize it. It is crucial for developers to update or remove the package to mitigate potential threats. Utilizing tools like Vulert can aid in monitoring and managing vulnerabilities effectively.

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FAQ

buc-utils is a utility library for Node.js applications that provides various functions to streamline development.

The malicious code can execute harmful actions, potentially leading to unauthorized access and data breaches.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

If an immediate update is not possible, consider removing the package from your project as a temporary workaround.

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How To Fix

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

npm uninstall buc-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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