Critical Malicious Code Vulnerability in @actbase/react-daum-postcode Package

@actbase/react-daum-postcode Updated 24 Nov 2025

Summary

24/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-190708: Malicious code in @actbase/react-daum-postcode (npm). Affects @actbase/react-daum-postcode versions 1.0.5. No fix is published. How to fix ↓

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Background

The @actbase/react-daum-postcode package is an npm library designed to provide a user-friendly interface for integrating the Daum Postcode API into React applications. It allows developers to easily implement postcode search functionality. However, this package has been identified to contain malicious code that compromises the security of any system where it is installed.

Vulnerability Detail

The vulnerability originates from the inclusion of malicious code within the @actbase/react-daum-postcode package. This code can lead to a complete compromise of any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of the code is classified under CWE-506, indicating that it embeds harmful functionalities that can be exploited by attackers.

How To Fix

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

npm uninstall @actbase/react-daum-postcode

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

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Workaround

There are no effective workarounds for this vulnerability other than removing the package entirely. It is recommended to avoid using this package until a secure alternative is found.

Conclusion

The @actbase/react-daum-postcode package has been identified as containing malicious code that poses a significant security risk. Immediate action is required to uninstall the package and secure any sensitive information. Continuous monitoring of dependencies is essential to prevent future vulnerabilities.

See every vulnerability recorded for @actbase/react-daum-postcode →

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FAQ

You should uninstall the package immediately and rotate any sensitive information stored on your system.

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

Failing to address this vulnerability can lead to unauthorized access to sensitive data, potential data breaches, and complete system compromise.

Currently, there is no patched version available for the @actbase/react-daum-postcode package. It is advised to remove it entirely.

Regularly monitor your dependencies for vulnerabilities using tools like Vulert, and ensure to keep your packages updated.

How To Fix

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

npm uninstall @actbase/react-daum-postcode

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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