Malicious code in urlver (PyPI)

urlver Updated 02 Oct 2025

Summary

25/02/2023
CRITICAL
No i
Critical
Not published

MAL-2023-7802: Malicious code in urlver (PyPI). Affected versions are not published. No fix is published. How to fix ↓

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Background

The urlver package is an open-source Python package available on the Python Package Index (PyPI). It is used for URL verification and manipulation. The package provides functionality to parse, validate, and manipulate URLs. However, the package has been found to contain malicious code.

Vulnerability Detail

The urlver package has been compromised by the EsqueleSquad group, who published nearly 6000 malicious PyPi and NPM packages. These packages execute spyware and information-stealing malware. The specific vulnerability in urlver allows the execution of malicious code when using the package.

How To Fix

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

pip uninstall urlver

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

There is no known workaround for this vulnerability. It is crucial to update to a non-malicious version of urlver as soon as possible.

Conclusion

The urlver package on PyPI has been compromised with malicious code. It is crucial to update to a non-malicious version of the package to ensure the security of your application. For further support on vulnerability remediation, you can contact DevNack.com.

See every vulnerability recorded for urlver →

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FAQ

Urlver is a Python package used for URL verification and manipulation. It provides functionality to parse, validate, and manipulate URLs.

The urlver package was compromised by the EsqueleSquad group, who published malicious versions of the package on PyPI.

The malicious code in the urlver package can execute spyware and information-stealing malware, potentially compromising user data and system security.

You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.

If you have discovered this vulnerability or have additional information, please contact supplychainsecurity@checkmarx.com or visit https://bit.ly/checkmarx-malicious-packages to report it to Checkmarx.

How To Fix

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

pip uninstall urlver

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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