Critical Malicious Code Vulnerability in bufver-xor Package

bufver-xor Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16315: Malicious code in bufver-xor (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The bufver-xor package is an npm library designed for handling buffer operations with XOR functionality. It is commonly used in applications that require efficient data manipulation and encoding. However, this package has been identified to contain malicious code, posing significant risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the bufver-xor package stems from the inclusion of malicious code that can compromise the security of applications using this library. This code may lead 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 promptly.

How To Fix

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

npm uninstall bufver-xor

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, consider using alternative packages that provide similar functionality without the associated risks. Always ensure to review the security status of any package before integrating it into your project.

Conclusion

The bufver-xor package has been identified as containing malicious code, which poses significant security risks to applications. Developers are advised to uninstall the package and monitor for any updates or patches. Utilizing tools like Vulert can help in identifying vulnerabilities in your projects.

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FAQ

bufver-xor is an npm package used for buffer operations with XOR functionality, commonly utilized in data manipulation tasks.

The malicious code can lead to unauthorized access and potential data breaches in applications that use the bufver-xor package.

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

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

You should uninstall the bufver-xor package immediately and consider using alternative libraries that provide similar functionality without security risks.

Related vulnerabilities

Recent vulnerabilities recorded for bufver-xor.

How To Fix

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

npm uninstall bufver-xor

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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