Malicious Code Detected in bufber-xor Package - Security Alert

bufber-xor Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16263: Malicious code in bufber-xor (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The bufber-xor package is an npm library designed for XOR operations on buffers. It is often used in applications requiring data manipulation and encryption. However, recent findings have revealed that this package contains malicious code, potentially compromising the integrity and security of applications that utilize it.

Vulnerability Detail

The vulnerability in the bufber-xor package stems from the inclusion of malicious code that can execute unauthorized actions within an application. This code can lead to data breaches, unauthorized access, and other security risks. The issue was introduced in version 0 of the package and has been flagged as a significant threat to users relying on this library for secure data handling.

How To Fix

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

npm uninstall bufber-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 removing the bufber-xor package from your project until a secure version is released. You can do this by executing 'npm uninstall bufber-xor' in your terminal.

Conclusion

The bufber-xor package has been identified as containing malicious code, posing significant security risks to applications that utilize it. Users are advised to update or remove the package to safeguard their projects. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities effectively.

See every vulnerability recorded for bufber-xor →

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FAQ

bufber-xor is an npm package used for performing XOR operations on buffers, commonly utilized in data manipulation and encryption tasks.

The malicious code can execute unauthorized actions, potentially leading to data breaches and compromising application security.

You can use Vulert to monitor and alert for vulnerabilities in your application. By analyzing your package-lock.json file, Vulert can identify if your application is affected by the bufber-xor vulnerability.

Yes, Vulert allows you to check for vulnerabilities using just your package-lock.json file, providing real-time alerts without requiring code access or installation.

If immediate updates are not possible, consider removing the bufber-xor package as a temporary measure to mitigate risks until a secure version is available.

Related vulnerabilities

Recent vulnerabilities recorded for bufber-xor.

How To Fix

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

npm uninstall bufber-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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