---
id: CVE-2025-66311
title: >-
  This admin plugin for Grav is an HTML user interface that provides a
  convenient way to configure Grav and easily create and modify pages
summary: >-
  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 /ad…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: getgrav
product: grav-plugin-admin
affected:
  - grav-plugin-admin <= 1.10.50
published: '2025-12-01'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66311'
references:
  - url: >-
      https://github.com/getgrav/grav-plugin-admin/commit/99f653296504f1d6408510dd2f6f20a45a26f9b0
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-mpjj-4688-3fxg'
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-mpjj-4688-3fxg'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00214
epssPercentile: 0.10429
ingestedAt: '2026-09-26T00:22:39.993Z'
---

## Overview

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

- `grav-plugin-admin <= 1.10.50`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.