Malicious Code Detected in compile-serialize-uglify-book-simulate Package

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-17449: Malicious code in compile-serialize-uglify-book-simulate (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The compile-serialize-uglify-book-simulate package is an npm library designed for serializing and uglifying JavaScript code. It is often used in web development to optimize code for production environments. However, this package has been found to contain malicious code, posing a significant security risk to applications that utilize it.

Vulnerability Detail

The vulnerability in the compile-serialize-uglify-book-simulate package originates from the inclusion of malicious code that can compromise the security of applications using this package. This malicious code could potentially lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The issue affects all versions of the package starting from its introduction, 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 compile-serialize-uglify-book-simulate

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary workaround, consider using alternative packages that provide similar functionality without the associated risks. Always ensure to review the security status of any package before integrating it into your project.

Conclusion

The compile-serialize-uglify-book-simulate package has been identified as containing malicious code, which poses a serious threat to applications that use it. Users are advised to uninstall the package and consider alternatives while monitoring for any updates or patches.

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FAQ

It is an npm library used for serializing and uglifying JavaScript code, primarily for optimization in web development.

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

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

Immediately uninstall the package and consider using alternative libraries. Monitor for any updates or patches that may address the vulnerability.

Utilize tools like Vulert to keep track of vulnerabilities in your open-source dependencies and receive alerts for any new issues.

How To Fix

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

npm uninstall compile-serialize-uglify-book-simulate

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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