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CVE-2025-66301— Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions

Quick assessment

Affected
getgrav grav
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grav是Grav开源的一套可扩展的用于个人博客、小型内容发布平台和单页产品展示的CMS（内容管理系统）。 Grav 1.8.0-beta.27之前版本存在授权问题漏洞，该漏洞源于授权检查不当，可能导致表单功能被修改。

AI Predicted 7.5 Difficulty: Easy EPSS 1.34% · P70

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-66301

Vulnerability Information
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Vulnerability Title
Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是Grav开源的一套可扩展的用于个人博客、小型内容发布平台和单页产品展示的CMS（内容管理系统）。 Grav 1.8.0-beta.27之前版本存在授权问题漏洞，该漏洞源于授权检查不当，可能导致表单功能被修改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav < 1.8.0-beta.27 -

II. Public POCs for CVE-2025-66301

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III. Intelligence Information for CVE-2025-66301

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Vendor Advisories for CVE-2025-66301 (1)

Same Patch Batch · getgrav · 2025-12-01 · 19 CVEs total

CVE-2025-66295 8.8 HIGH Grav vulnerable to Path traversal / arbitrary YAML write via user creation leading to Acco
CVE-2025-66296 8.8 HIGH Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check A
CVE-2025-66299 8.8 HIGH Security Sandbox Bypass with SSTI (Server Side Template Injection) in the Grav CMS
CVE-2025-66300 8.5 HIGH Grav is vulnerable to Arbitrary File Read
CVE-2025-66302 6.8 MEDIUM Grav vulnerable to Path Traversal allowing server files backup
CVE-2025-66307 6.5 MEDIUM Grav Admin Plugin vulnerable to User Enumeration & Email Disclosure
CVE-2025-66304 6.2 MEDIUM Grav Exposes Password Hashes Leading to privilege escalation
CVE-2025-66303 4.9 MEDIUM Grav is vulnerable to a DOS on the admin panel
CVE-2025-66306 4.3 MEDIUM Grav vulnerable to Information Disclosure via IDOR in Grav Admin Panel
CVE-2025-66312 Grav Admin Plugin vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/account
CVE-2025-66311 Grav vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/pages/[page]` in Mul
CVE-2025-66310 Grav vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/pages/[page]` parame
CVE-2025-66309 Grav vulnerable to Cross-Site Scripting (XSS) Reflected endpoint /admin/pages/[page], para
CVE-2025-66308 Grav Admin Plugin vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/config/
CVE-2025-66305 Grav vulnerable to Denial of Service via Improper Input Handling in 'Supported' Parameter
CVE-2025-66298 Grav is vulnerable to Server-Side Template Injection (SSTI) via Forms
CVE-2025-66297 Grav vulnerable to Privilege Escalation and Authenticated Remote Code Execution via Twig I
CVE-2025-66294 Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-285

V. Comments for CVE-2025-66301

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