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Vulnerability record · CVE-2025-66301 · published 1 December 2025

CVE-2025-66301: Getgrav grav improper authorization vulnerability

Getgrav · Grav

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.

8.6 CVSS 4.0 High EPSS 1.3% · top 29.9% CWE-285 · Improper authorization
8.6CVSS 4.0 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
26 Sep 2026Last modified by NVD

Description

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjh ExploitThird Party Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjh ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2024-34082Getgrav grav improper privilege management vulnerabilityGrav is a file-based Web platform. Prior to version 1.7.46, a low privilege user account with page edit privilege can read any server files using Twi…EPSS 3.0%9.8CVE-2025-46199Getgrav grav cross-site scripting vulnerabilityCross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to execute arbitrary code via a crafted script to the form fieldsEPSS 0.80%9.3CVE-2021-47812Getgrav grav missing authorization vulnerabilityGravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code thro…EPSS 2.2%9.1CVE-2025-66844Getgrav grav server-side request forgery (ssrf) vulnerabilityIn grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is processed by Twig and the con…EPSS 0.29%8.9CVE-2026-42611Getgrav grav cross-site scripting vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, a low-privileged (with the ability to create a page) user can cause XSS with the injection …EPSS 0.36%8.8CVE-2026-42608Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulatin…EPSS 0.52%8.8CVE-2025-66299Getgrav grav code injection vulnerabilityGrav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection (SSTI) that allows any authenti…EPSS 0.60%8.8CVE-2025-66295Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 1.8.0-beta.27, when a user with privilege of user creation creates a new user through the Admin UI and su…EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2025-66301), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.