XSS in Getgrav Grav-Plugin-Guestbook
CVE-2026-109322
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-jgpj-gchm-6j29 (vendor-advisory, third-party-advisory)
- www.vulncheck.com/advisories/grav-guestbook-before-0.5.2-stored-xss-via-ajax-pa… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109322?
- CVE-2026-109322 is a medium-severity vulnerability in Getgrav Grav-Plugin-Guestbook, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-12.
- How severe is CVE-2026-109322?
- Medium severity. CVSS v3 base score is 6.1 out of 10.