What is the CVSS score of CVE-2025-66298?

CVE-2025-66298 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Grav are affected by CVE-2025-66298?

A Server-Side Template injection vulnerability in Grav CMS versions prior to 1.8.0-beta.27 allows attackers to extract sensitive configuration data-including database credentials, API keys, and…. A patch is available.

Is there a public PoC exploit available for CVE-2025-66298?

Yes, a public proof-of-concept exploit is available for CVE-2025-66298. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-66298?

Within 24 hours: Identify all Grav instances in your environment and document their versions; immediately disable or restrict public access to forms if running versions before 1.8.0-beta.27. Within 7 days: Apply the available patch to upgrade to version 1.8.0-beta.27 or later on all affected systems. Within 30 days: Conduct a credential audit to identify any exposed secrets from configurations and rotate all potentially compromised credentials (database passwords, API keys, service accounts).

Grav CVE-2025-66298

EUVD-2025-200076 HIGH

Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)

2025-12-01 security-advisories@github.com

GHSA-8535-hvm8-2hmv

Information Disclosure Grav

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-200076

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

Patch released

Mar 15, 2026 - 13:34 nvd

Patch available

PoC Detected

Dec 03, 2025 - 15:51 vuln.today

Public exploit code

CVE Published

Dec 01, 2025 - 22:15 nvd

HIGH 7.5

DescriptionGitHub Advisory

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.

Analysis

Technical ContextAI

Information disclosure occurs when an application inadvertently reveals sensitive data to unauthorized actors through error messages, logs, or improper access controls.

RemediationAI

A vendor patch is available — apply it immediately. Implement proper access controls. Sanitize error messages in production. Review logging practices to avoid capturing sensitive data.