CVE-2025-66311: Getgrav Grav-Plugin-Admin

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.11.0-beta.1, a Stored Cross-Site Scripting (XSS) vulnerability was identified in the /admin/pages/[page] endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[header][metadata], data[header][taxonomy][category], and data[header][taxonomy][tag] parameters. These scripts are stored in the page frontmatter and executed automatically whenever the affected page is accessed or rendered in the administrative interface. This vulnerability is fixed in 1.11.0-beta.1.

Affected products

• Getgrav Grav-Plugin-Admin: up to and including 1.10.50

Published 2025-12-01. Last modified 2026-09-26.