CVE-2026-109322 Grav Guestbook before 0.5.2 Stored XSS via AJAX Pagination and Admin Views
Unauthenticated attackers can inject malicious scripts via guestbook entries, potentially compromising other visitors and administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-109322?
CVE-2026-109322 is a medium-severity cross-site scripting vulnerability in getgrav grav-plugin-guestbook, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-109322?
How do I fix CVE-2026-109322?
No fix has been published for CVE-2026-109322 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-109322 being exploited?
There is no known exploitation of CVE-2026-109322 in the wild and no public exploit code.
Sources
Also known as GHSA-44rc-569f-hxfg, GHSA-jgpj-gchm-6j29.