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CVE-2025-66294

44
FAUCET Score

CVE-2025-66294 is a Server-Side Template Injection (SSTI) vulnerability in Grav, a file-based web platform, affecting versions prior to 1.8.0-beta.27. This flaw, caused by weak regex validation, allows authenticated attackers with editor permissions to execute arbitrary commands, and potentially unauthenticated attackers under specific conditions. Rated 8.8 HIGH on CVSS, it poses a significant risk with high impact on confidentiality, integrity, and availability. While not on CISA's KEV catalog, a Metasploit module exists, and the vulnerability has garnered substantial community discussion, indicating high exploitability potential.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.7.48, < 1.8.0CPE matchmatch criteria
cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:getgrav:grav:1.8.0:beta1:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:getgrav:grav:1.8.0:beta10:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:getgrav:grav:1.8.0:beta11:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:getgrav:grav:1.8.0:beta12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

8.7HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
2.70%
Probability of exploitation in next 30 days
EPSS Percentile
84.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Grav CMS Twig SSTI Authenticated Sandbox Bypass RCE · Dec 1, 2025
This CVE's current EPSS score of 0.0270 is in the 83rd percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: getgrav/gravFixed in: 1.8.0-beta.27
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-662m-56v4-3r8fhigh

Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass

Dec 2, 2025

References

github.com / getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458
Patch
github.com / getgrav/grav/security/advisories/GHSA-662m-56v4-3r8f
ExploitVendor Advisory