Critical Malicious Code Vulnerability in vite-plugin-js-support Package

vite-plugin-js-support Updated 02 Oct 2025

Summary

29/07/2025
CRITICAL
No i
Critical
Not published

MAL-2025-6345: Malicious code in vite-plugin-js-support (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

vite-plugin-js-support is an npm package designed to enhance JavaScript support in Vite projects, providing developers with tools to streamline their workflow. However, it has been identified as containing malicious code, which poses significant security risks to any system where it is installed. This vulnerability can lead to unauthorized access and potential compromise of sensitive data.

Vulnerability Detail

The vulnerability originates from the inclusion of embedded malicious code within the vite-plugin-js-support package. This code can fully compromise any computer that has the package installed, allowing attackers to gain control over the system. The ramifications include unauthorized access to secrets and keys stored on the affected machine, which can lead to further exploitation and data breaches. Users are advised to treat any system with this package as compromised.

How To Fix

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

npm uninstall vite-plugin-js-support

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

Currently, there are no effective workarounds to mitigate the risks posed by this vulnerability other than removing the package and rotating any secrets or keys that may have been exposed.

Conclusion

The vite-plugin-js-support package has been identified as containing malicious code, posing serious security risks. Immediate action is required to remove the package and secure any potentially compromised information. Utilizing tools like Vulert can help in monitoring and preventing future vulnerabilities.

See every vulnerability recorded for vite-plugin-js-support →

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FAQ

You should immediately remove the package and rotate any sensitive information that may have been compromised.

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

Leaving the package installed can lead to unauthorized access to your system, potential data breaches, and further exploitation by attackers.

After removing the package, it is essential to rotate all secrets and keys. However, there is no guarantee that all malicious software will be removed.

Regularly monitor your dependencies for vulnerabilities using tools like Vulert and keep your packages updated to the latest secure versions.

How To Fix

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

npm uninstall vite-plugin-js-support

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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