Malicious Code Detected in checkout-web Package - MAL-2025-16884

checkout-web Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16884: Malicious code in checkout-web (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The checkout-web package is an npm library designed to facilitate online checkout processes in web applications. It provides developers with tools to streamline payment processing and enhance user experience during transactions. However, it has been identified that this package contains malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the checkout-web package stems from the inclusion of malicious code that can compromise the security of applications using this library. This code may allow unauthorized access to sensitive data, lead to data breaches, or enable other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for developers to address this vulnerability promptly.

How To Fix

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

npm uninstall checkout-web

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 measure, consider removing the checkout-web package from your project until a secure version is available. You can do this by executing: npm uninstall checkout-web. This will help mitigate the risk of exploitation while you await a fix.

Conclusion

The checkout-web package has been identified to contain malicious code, posing serious security risks to applications. It is crucial for developers to update to a patched version or remove the package until a fix is available. Utilizing tools like Vulert can help monitor for such vulnerabilities effectively.

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FAQ

The checkout-web package is an npm library that helps developers implement online checkout functionalities in their web applications.

The malicious code found in the checkout-web package can potentially compromise application security, leading to 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 if your application is affected without needing to sign up.

Yes, it is recommended to update the checkout-web package to the latest patched version to eliminate the vulnerability.

If an immediate update is not possible, consider removing the checkout-web package from your project as a temporary workaround.

How To Fix

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

npm uninstall checkout-web

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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