Malicious Code Exfiltration in Sitoogether Package

sitoogether Updated 03 Dec 2025

Summary

19/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-191870: Malicious code in sitoogether (PyPI). Affects sitoogether versions 0.0.1 – 0.0.4. No fix is published. How to fix ↓

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Background

Sitoogether is a package available on PyPI that is designed for various functionalities related to data handling and manipulation. However, it has been identified to contain malicious code that exfiltrates sensitive information from the host system, such as IP addresses and usernames. This vulnerability poses a significant risk to users who install or import the package, as it operates without their consent and serves no legitimate purpose.

Vulnerability Detail

The vulnerability originates from the package's design, where it overrides the install command in setup.py to execute malicious code during installation. This code is responsible for exfiltrating basic data from the system, including the user's IP address and username. The ramifications of this vulnerability include unauthorized data access and potential privacy breaches, as the package has no other functionality apart from this malicious behavior.

How To Fix

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

pip uninstall sitoogether

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary workaround, users can avoid installing the Sitoogether package altogether and seek alternative packages that provide similar functionalities without the associated risks. Additionally, users can run security scans on their systems to identify and remove any instances of the malicious package.

Conclusion

The Sitoogether package has been identified as containing malicious code that exfiltrates sensitive information from users' systems. It is crucial for users to uninstall the package and monitor for any updates. Utilizing tools like Vulert can help in identifying vulnerabilities in open-source packages.

See every vulnerability recorded for sitoogether →

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FAQ

Sitoogether is a Python package available on PyPI, designed for data handling and manipulation tasks.

The vulnerability allows the package to exfiltrate sensitive information such as IP addresses and usernames from the host system.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.

If you have installed the Sitoogether package, you should uninstall it immediately and monitor for any updates or patches.

Yes, there are various alternative packages available on PyPI that provide similar functionalities without the associated risks.

How To Fix

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

pip uninstall sitoogether

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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