Critical Malicious Code Vulnerability in cronek Package

cronek Updated 02 Oct 2025

Summary

15/07/2025
CRITICAL
No i
Critical
Not published

MAL-2025-5904: Malicious code in cronek (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The cronek package is an npm module designed for various functionalities within JavaScript applications. It is commonly used for tasks such as data manipulation and API interactions. However, this package has been identified to contain embedded malicious code, making it a significant security risk for any application that utilizes it.

Vulnerability Detail

The vulnerability stems from the presence of embedded malicious code within the cronek 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 malicious nature of the code is classified under CWE-506, indicating that it appears to be intentionally harmful. Users should be aware that simply removing the package may not eliminate all traces of the malicious software, as full control of the affected system may have been compromised.

How To Fix

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

npm uninstall cronek

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 measure, you can isolate the affected application from the network to prevent further data leakage until the package is removed. Additionally, consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The cronek package has been identified as containing malicious code, posing a severe risk to any systems using it. Immediate action is required to remove the package and secure any compromised data. Regular monitoring of dependencies is crucial to maintaining application security.

See every vulnerability recorded for cronek →

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FAQ

You should remove the cronek package from your project immediately and rotate any secrets or keys stored on the affected machine.

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.

No, it is not safe to continue using cronek as it contains malicious code. Immediate removal is recommended.

Failing to address this vulnerability can lead to unauthorized access to sensitive data, potential data breaches, and full system compromise.

While many npm packages are safe, it is essential to review and monitor all dependencies regularly for vulnerabilities using tools like Vulert.

How To Fix

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

npm uninstall cronek

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 →

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