Critical Vulnerability in selenium-session: Malicious Code Injection
Summary
MAL-2025-191421: Malicious code in selenium-session (npm). Affects selenium-session versions 1.0.5. 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 selenium-session package is an npm library designed to facilitate browser automation using Selenium WebDriver. It allows developers to manage browser sessions efficiently. However, this package has been compromised, making it susceptible to malicious attacks that can lead to severe security breaches.
Vulnerability Detail
The vulnerability stems from a malicious code injection by the Sha1-Hulud: The Second Coming NPM worm. This worm is designed to steal sensitive tokens and credentials from users and publish them to GitHub. Additionally, it can propagate itself to other npm packages owned by the user and establish persistence through GitHub actions. The malicious payload poses a significant risk as it may also delete the user's home directory, leading to data loss.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall selenium-sessionIf 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 selenium-session package from your project until a secure version is released. Use the following command to uninstall it: npm uninstall selenium-session.
Conclusion
The selenium-session package has been compromised by a malicious worm that poses significant security risks. It is essential for users to update their packages and monitor their applications for vulnerabilities to safeguard their data and credentials.
See every vulnerability recorded for selenium-session →
FAQ
The vulnerability involves malicious code that steals user credentials and can delete files from the user's home directory.
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.
Immediately update the selenium-session package to a secure version using the command: npm update selenium-session.
Yes, the worm can propagate itself to other npm packages owned by the user, increasing the risk of widespread compromise.
Consequences include unauthorized access to sensitive information, data loss, and potential damage to the user's development environment.
