Malicious Code Detected in elecsim Package - Security Alert

elecsim Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-19397: Malicious code in elecsim (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The elecsim package is an npm library designed for simulating electrical circuits. It provides users with tools to model and analyze circuit behavior, making it a valuable resource for developers and engineers. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users and their applications.

Vulnerability Detail

The vulnerability in the elecsim package originates from the inclusion of malicious code that can compromise user systems. This code could potentially lead to unauthorized access, data breaches, or other harmful actions. The presence of such code in a widely used package raises serious concerns about the integrity and security of applications relying on elecsim.

How To Fix

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

npm uninstall elecsim

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, users may consider removing the elecsim package from their projects until a secure version is released. This can be done by executing the command: 'npm uninstall elecsim'. Additionally, users can explore alternative packages that provide similar functionality without the associated risks.

Conclusion

The discovery of malicious code in the elecsim package highlights the importance of maintaining secure dependencies in software development. Users are urged to update or remove the package to mitigate risks and consider utilizing tools like Vulert for ongoing monitoring of their applications.

See every vulnerability recorded for elecsim →

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FAQ

The elecsim package is used for simulating electrical circuits, allowing developers and engineers to model and analyze circuit behavior.

The malicious code found in the elecsim package can compromise user systems, potentially leading to unauthorized access and data breaches.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By analyzing your package-lock.json file, Vulert can identify if your application is affected. You can also check the Vulert playground at Vulert Scanner without signing up.

If you cannot update the package right away, consider uninstalling it and looking for alternative packages that offer similar functionality without the security risks.

Yes, tools like Vulert can help you monitor your dependencies for vulnerabilities in real-time, ensuring that you are alerted to any potential risks.

How To Fix

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

npm uninstall elecsim

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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