Malicious Code Detected in fusion-plugin-tracer: Security Alert

fusion-plugin-tracer Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-21076: Malicious code in fusion-plugin-tracer (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The fusion-plugin-tracer is an npm package designed to facilitate tracing and monitoring in applications built with the Fusion.js framework. It provides developers with tools to track performance and diagnose issues within their applications. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users and their applications.

Vulnerability Detail

The vulnerability stems from the inclusion of malicious code within the fusion-plugin-tracer package. This code can potentially compromise the security of applications that utilize this package, leading 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 users to take immediate action to mitigate the risks associated with this vulnerability.

How To Fix

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

npm uninstall fusion-plugin-tracer

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 measure, users can remove the fusion-plugin-tracer package from their project until a secure version is released. This can be done using the command: npm uninstall fusion-plugin-tracer. Additionally, consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The discovery of malicious code in the fusion-plugin-tracer package highlights the importance of vigilance in managing open-source dependencies. Users are urged to take immediate action to secure their applications by updating or removing the affected package and utilizing tools like Vulert to monitor for vulnerabilities.

See every vulnerability recorded for fusion-plugin-tracer →

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FAQ

The fusion-plugin-tracer package is an npm module used for tracing and monitoring applications built with the Fusion.js framework.

The specific nature of the malicious code has not been disclosed, but it poses significant security risks, including potential data breaches and unauthorized access.

You can use Vulert, a tool that monitors and alerts for open-source vulnerabilities in your software. Simply upload your package-lock.json file to the Vulert playground at Vulert Scanner to check for vulnerabilities.

As of now, there is no patched version available. Users are advised to monitor the package for updates and apply them as soon as they are released.

If immediate removal is not possible, consider implementing additional security measures in your application to mitigate potential risks while you work on a solution.

How To Fix

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

npm uninstall fusion-plugin-tracer

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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