Malicious Code Detected in fontcharacter Package - Security Alert

fontcharacter Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-20750: Malicious code in fontcharacter (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The fontcharacter package is an npm library designed to facilitate the use of special font characters in web applications. It allows developers to easily integrate and manipulate font characters for enhanced user interfaces. However, recent findings have revealed that this package contains malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the fontcharacter package arises 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 harmful actions within the affected systems. The issue originates from version 0 and affects all subsequent versions, making it critical for users to take immediate action to mitigate potential risks.

How To Fix

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

npm uninstall fontcharacter

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 fontcharacter package from your project until a secure version is released. Use the following command to uninstall the package: 'npm uninstall fontcharacter'. This will help mitigate the risks associated with the malicious code.

Conclusion

The discovery of malicious code in the fontcharacter package poses a serious threat to applications utilizing this library. Immediate action is required to update or remove the package to safeguard against potential security breaches. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

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FAQ

fontcharacter is an npm library that allows developers to use special font characters in their web applications.

The malicious code can lead to unauthorized access and potential data breaches in applications using the fontcharacter package.

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

It is crucial to check the package repository for any patched versions of fontcharacter. If available, updating the package will resolve the vulnerability.

As a temporary measure, consider uninstalling the fontcharacter package to mitigate risks until a secure version is available.

How To Fix

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

npm uninstall fontcharacter

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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