CVE-2025-66311
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-01

Last updated on: 2025-12-03

Assigner: GitHub, Inc.

Description
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.
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Meta Information
Published
2025-12-01
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-12-01
EPSS Evaluated
2026-06-14
NVD
CVE-2025-66311
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
getgrav grav-plugin-admin to 1.10.50 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Grav admin plugin prior to version 1.11.0-beta.1. It occurs in the /admin/pages/[page] endpoint, where attackers can inject malicious scripts into certain parameters (data[header][metadata], data[header][taxonomy][category], and data[header][taxonomy][tag]). These scripts are stored in the page frontmatter and executed automatically when the affected page is accessed or rendered in the admin interface.

Impact Analysis

This vulnerability can allow attackers to execute malicious scripts within the administrative interface of the Grav application. This can lead to unauthorized actions, data theft, or compromise of the administrative environment whenever an affected page is accessed or rendered.

Mitigation Strategies

To mitigate this vulnerability, upgrade the Grav admin plugin to version 1.11.0-beta.1 or later, as this version contains the fix for the Stored Cross-Site Scripting (XSS) vulnerability in the /admin/pages/[page] endpoint.

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