Malicious Code Detected in cli-theme Package - Security Alert

cli-theme Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-17120: Malicious code in cli-theme (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The cli-theme package is a Node.js library used for customizing command-line interface themes. It allows developers to enhance the visual appeal of their applications' command-line outputs. However, this package has been found to contain malicious code, posing a significant security risk to users who integrate it into their projects.

Vulnerability Detail

The vulnerability in the cli-theme package stems 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 malicious code was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action.

How To Fix

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

npm uninstall cli-theme

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 can remove the cli-theme package from their project until a secure version is released. This can be done using the following command: npm uninstall cli-theme. Consider using alternative packages that provide similar functionality without security risks.

Conclusion

The cli-theme package has been identified as containing malicious code, which poses a serious security threat to users. It is crucial for developers to update or remove the package to safeguard their applications. Regular monitoring and using tools like Vulert can help in identifying such vulnerabilities in the future.

See every vulnerability recorded for cli-theme →

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FAQ

cli-theme is a Node.js library designed to customize the appearance of command-line interfaces.

The malicious code can potentially allow unauthorized access and compromise the security of applications using the package.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Check your application using the Vulert playground at Vulert Scanner.

Currently, there is no patched version available. Users should monitor the package repository for updates.

If removal is not an option, consider implementing additional security measures and monitoring your application closely until a secure version is released.

How To Fix

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

npm uninstall cli-theme

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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