CVE-2025-66298Public exploitNetwork attack vector

Configuration disclosure via evaluated form identifier templates

Published Dec 1, 2025 · Updated Dec 2, 2025

Server-side template injection in GetGrav Grav before 1.8.0-beta.27 allows remote attackers to disclose configuration data through form POSTs. Form submission processing evaluates Twig syntax supplied in the unique_form_id POST field, exposing the template context and its configuration objects. An unauthenticated request can reach the flaw only when the site exposes a form; disclosure includes core and plugin settings that can contain secrets.

CVSS severity7.5
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in GetGrav Grav before 1.8.0-beta.27 allows remote attackers to disclose configuration data through form POSTs. Form submission processing evaluates Twig syntax supplied in the unique_form_id POST field, exposing the template context and its configuration objects. An unauthenticated request can reach the flaw only when the site exposes a form; disclosure includes core and plugin settings that can contain secrets.

The record

CVE
CVE-2025-66298
Published
Dec 1, 2025
Updated
Dec 2, 2025
Vendor
GetGrav
Product
Grav
Classifications
CWE-1336, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.8.0-beta.27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GetGrav · Gravversion=< 1.8.0-beta.27

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.7GitHubCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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