CVE-2026-109319: Getgrav Grav-Plugin-Guestbook

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Getgrav Grav-Plugin-Guestbook: from 0.5.0, before 0.5.2 (fixed in 0.5.2)

Published 2026-10-12. Last modified 2026-10-15.