Malicious Code Detected in closure-es6 Package - MAL-2025-17150
Summary
MAL-2025-17150: Malicious code in closure-es6 (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The closure-es6 package is a JavaScript library designed for handling ES6 (ECMAScript 2015) features, enabling developers to write modern JavaScript code. It is widely used in various applications for its ability to simplify code management and enhance performance. However, recent findings have revealed that this package contains malicious code, posing significant risks to users and their applications.
Vulnerability Detail
The vulnerability in the closure-es6 package stems from the inclusion of malicious code that can compromise the security of applications utilizing this library. This malicious code can lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The issue was introduced in version 0 and affects all subsequent versions, making it critical for users to address this vulnerability promptly.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall closure-es6If 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 removing the closure-es6 package from your project until a secure version is released. You can do this by executing: npm uninstall closure-es6. Additionally, monitor your application for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
The closure-es6 package has been found to contain malicious code, posing a significant threat to applications using it. Users are strongly advised to update or remove the package to mitigate risks. Utilizing tools like Vulert can help monitor for vulnerabilities in real-time.
See every vulnerability recorded for closure-es6 →
FAQ
The closure-es6 package is a JavaScript library that helps developers work with ES6 features, making it easier to write modern JavaScript code.
The malicious code was identified through security audits and reports from security researchers, including Amazon Inspector.
The risks include unauthorized access to sensitive data, potential data breaches, and the possibility of malicious actions being executed within the application.
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.
If an immediate update is not possible, consider removing the package as a temporary measure and monitor your application for any signs of exploitation.
