What is CVE-2025-66298?

CVE-2025-66298 is a high-severity vulnerability in Getgrav Grav, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 7.5/10. Published 2025-12-01.

How severe is CVE-2025-66298?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Getgrav Grav

CVE-2025-66298

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.

Published 2025-12-01 · last modified 2026-09-26.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (29.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Getgrav Grav — versions 1.8.0, < 1.8.0-beta.27

Weakness classification (CWE)

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

References

github.com/getgrav/grav/security/advisories/GHSA-8535-hvm8-2hmv (Exploit, Third Party Advisory)
github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458 (Patch)

Frequently asked questions

What is CVE-2025-66298?: CVE-2025-66298 is a high-severity vulnerability in Getgrav Grav, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 7.5/10. Published 2025-12-01.
How severe is CVE-2025-66298?: High severity. CVSS v3 base score is 7.5 out of 10.