CVE-2026-109322: Getgrav Grav-Plugin-Guestbook

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

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

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