Malicious Code Detected in buffmr-xor Package - Security Alert

buffmr-xor Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16311: Malicious code in buffmr-xor (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The buffmr-xor package is an npm library designed for performing XOR operations on buffers. It is utilized in various JavaScript applications for data manipulation and encryption tasks. However, this package has been found to contain malicious code, posing significant security risks to applications that depend on it.

Vulnerability Detail

The vulnerability in the buffmr-xor package originates from the inclusion of malicious code that can compromise the integrity and security of applications using this library. This code may allow unauthorized access to sensitive data, lead to data corruption, or enable remote code execution. The malicious nature of this vulnerability makes it critical for developers to address it immediately to protect their applications and users.

How To Fix

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

npm uninstall buffmr-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, you can remove the buffmr-xor package from your project until a secure version is available. You can do this by executing the command: 'npm uninstall buffmr-xor'. Alternatively, consider using a different library that offers similar functionality without the associated risks.

Conclusion

The buffmr-xor package has been identified as containing malicious code, which poses a serious threat to applications that utilize it. Developers are urged to update or remove the package to safeguard their applications. Utilizing tools like Vulert can help monitor for such vulnerabilities effectively.

See every vulnerability recorded for buffmr-xor →

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FAQ

The buffmr-xor package is used for performing XOR operations on buffers in JavaScript applications.

The malicious code can compromise application security, potentially leading to unauthorized access and data corruption.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.

Yes, it is recommended to update the buffmr-xor package to the latest patched version to mitigate the vulnerability.

If you cannot update the package, consider removing it from your project or using an alternative library until a secure version is released.

Related vulnerabilities

Recent vulnerabilities recorded for buffmr-xor.

How To Fix

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

npm uninstall buffmr-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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