Critical Malicious Code Vulnerability in express-js-web Package
Summary
MAL-2025-192968: Malicious code in express-js-web (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The express-js-web package is a Node.js framework designed to facilitate web application development. It provides a robust set of features for building web and mobile applications, including routing, middleware support, and template rendering. However, this package has been identified as containing malicious code, posing significant security risks to any system utilizing it.
Vulnerability Detail
The vulnerability stems from the presence of embedded malicious code within the express-js-web package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information such as secrets and keys. The origin of this vulnerability is linked to malicious actors who have injected harmful code into the package, making it a severe threat to users and their systems.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall express-js-webIf 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 workaround, it is advisable to temporarily halt any applications utilizing the express-js-web package until the package is removed and the system is secured. Additionally, consider using alternative packages that do not have known vulnerabilities.
Conclusion
The express-js-web package has been identified as containing malicious code, posing a significant security risk to any systems utilizing it. Immediate action is required to remove the package and secure any sensitive information. Users are encouraged to monitor their applications for vulnerabilities using tools like Vulert.
See every vulnerability recorded for express-js-web →
FAQ
The express-js-web package is a Node.js framework that simplifies web application development by providing essential features like routing and middleware support.
The malicious code can compromise your system, allowing unauthorized access to sensitive information and potentially leading to data breaches.
You should immediately remove the express-js-web package and rotate any secrets or keys stored on the affected system.
There is no patch available for the express-js-web package due to the nature of the compromise. The best course of action is to remove the package entirely.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just the package-lock.json file. You can also check your application for vulnerabilities using the Vulert playground without any signup.
