CVE-2025-66298— Grav is vulnerable to Server-Side Template Injection (SSTI) via Forms
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之前版本存在安全漏洞，该漏洞源于服务器端模板注入，可能导致泄露整个Grav配置详细信息。
Possible ATT&CK Techniques 2 AI
T1005 · Data from Local System T1592 · Gather Victim Host Information
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I. Basic Information for CVE-2025-66298
Vulnerability Information
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Vulnerability Title
Grav is vulnerable to Server-Side Template Injection (SSTI) via Forms
Source: CVE Program / CVE List V5
Vulnerability Description
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, having a simple form on site can reveal the whole Grav configuration details (including plugin configuration details) by using the correct POST payload to exploit a Server-Side Template (SST) vulnerability. Sensitive information may be contained in the configuration details. 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:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 安全漏洞
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之前版本存在安全漏洞，该漏洞源于服务器端模板注入，可能导致泄露整个Grav配置详细信息。
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
II. Public POCs for CVE-2025-66298
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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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-2025-66301 | Grav ihas Broken Access Control which allows an Editor to modify the page's YAML Frontmatt | |
| 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
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CVE-2026-100670
Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blue -
CVE-2026-100671
Grav before 2.0.25 Session Cookie Theft via Twig Sandbox -
CVE-2026-100669
Grav before 2.0.25 Sensitive File Disclosure via Case-Variat -
CVE-2026-100668
Grav before 2.0.25 Sandbox Escape via array Filter -
CVE-2026-100667
grav-plugin-login 3.8.7 through 3.9.6 Two-Factor Authenticat
Same vendor: getgrav
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CVE-2026-100673
Grav Data Manager before 1.4.5 Stored XSS via item-detail vi -
CVE-2026-100672
grav-plugin-comments before 1.2.11 Unauthenticated Informati -
CVE-2026-100671
Grav before 2.0.25 Session Cookie Theft via Twig Sandbox -
CVE-2026-100670
Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blue -
CVE-2026-100669
Grav before 2.0.25 Sensitive File Disclosure via Case-Variat
Same weakness: CWE-1336
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V. Comments for CVE-2025-66298
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