Malicious Code Detected in express-chat Package - Security Alert

express-chat Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-20070: Malicious code in express-chat (npm). Affected versions are not published. No fix is published. How to fix ↓

Free scan

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.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Devnack Penetration testing for web, API and mobile Manual testing by engineers who build software, not an auditor's checklist. Trusted by teams at Swift and Google Talk to Devnack

Background

The express-chat package is an npm library designed for building chat applications. It provides functionalities such as real-time messaging and user management. However, it has been identified to contain malicious code, which poses a significant security risk to applications utilizing this package.

Vulnerability Detail

The vulnerability in the express-chat package originates from the inclusion of malicious code that can compromise the security of applications using it. This code may lead to unauthorized access, data breaches, or other harmful actions. Users of the package are at risk of exploitation, making it crucial to address this issue promptly.

How To Fix

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

npm uninstall express-chat

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 workaround, you can remove the express-chat package from your project until a secure version is released. Use the following command to uninstall it: npm uninstall express-chat.

Conclusion

The express-chat package has been identified to contain malicious code, posing a serious security risk. Users are encouraged to update the package or remove it until a secure version is available. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.

See every vulnerability recorded for express-chat →

Share this vulnerability

FAQ

The express-chat package is an npm library used for creating chat applications with features like real-time messaging.

The malicious code can lead to unauthorized access and potential data breaches in applications using the express-chat package.

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

Yes, it is advised to update to the latest version of the express-chat package, which may contain a patch for this vulnerability.

If immediate updates are not possible, consider removing the express-chat package from your project as a temporary measure.

How To Fix

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

npm uninstall express-chat

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 →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback