Malicious Code Detected in esselin Package - Security Alert
Summary
MAL-2025-19870: Malicious code in esselin (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 esselin package is an npm library designed for specific functionalities within JavaScript applications. It is commonly used for various tasks, but recent findings have revealed that it contains malicious code, posing a significant risk to users and their applications. The package's widespread use increases the potential impact of this vulnerability.
Vulnerability Detail
The esselin package has been identified to contain malicious code that can compromise the security of applications utilizing it. This vulnerability originated from the package itself, which was found to have been tampered with, allowing attackers to execute harmful actions within the user's environment. The ramifications of this vulnerability can include unauthorized access to sensitive data, system manipulation, and potential exploitation of the affected applications.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall esselinIf 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, users can remove the esselin package from their project until a secure version is released. This can be accomplished by executing the command: 'npm uninstall esselin'.
Conclusion
The discovery of malicious code in the esselin package highlights the importance of regularly monitoring and updating dependencies in software projects. Users are advised to take immediate action to mitigate risks associated with this vulnerability.
See every vulnerability recorded for esselin →
FAQ
Esselin is an npm package used in JavaScript applications for various functionalities. However, it has recently been found to contain malicious code.
You can use Vulert, a tool that monitors and alerts for open-source vulnerabilities. By analyzing your package-lock.json file, Vulert can inform you if your application is at risk.
If you are using esselin, it is crucial to update the package to the latest version or remove it from your project until a secure version is available.
Detailed information about this vulnerability can be found in the official GitHub repository for malicious packages or by checking security advisories related to npm packages.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
