CVE-2025-66311: Grav vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/pages/[page]` in Multiples parameters

CVE-2025-66311 · Severity: medium · CVSS 5.4 · Published 2025-12-01

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.

Technologies: Getgrav Grav-Plugin-Admin, getgrav/grav (Packagist). Vendors: Getgrav, Packagist.

Quick answers

Is CVE-2025-66311 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-66311 being exploited in the wild.
How severe is CVE-2025-66311?
Medium severity, with a CVSS score of 5.4, published 1 December 2025.
Which products and versions are affected?
getgrav/grav (Packagist) ECOSYSTEM:introduced=0,fixed=1.11.0-beta.1.
Is there a fix for CVE-2025-66311?
Yes. getgrav/grav (Packagist): upgrade to 1.11.0-beta.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-66311?
Check whether you run Getgrav Grav-Plugin-Admin or getgrav/grav (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • getgrav/grav (Packagist): upgrade to 1.11.0-beta.1 or later
    composer require getgrav/grav:^1.11.0-beta.1

Affected products

  • Getgrav Grav-Plugin-Admin
  • getgrav/grav (Packagist) ECOSYSTEM:introduced=0,fixed=1.11.0-beta.1

Identifiers

  • CVE-2025-66311
  • GHSA-mpjj-4688-3fxg

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