CVE-2025-66294

HIGH EPSS 83.4%
Published Dec 1, 20257mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Dec 1, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago

Description

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection (SSTI) vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak regex validation in the cleanDangerousTwig method. This vulnerability is fixed in 1.8.0-beta.27.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
83.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-1336
CWE-94 Improper Control of Generation of Code (Code Injection) Injection

Affected Products 27

VendorProductVersionRange
getgravgrav*≥1.7.48  –  <1.8.0
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any
getgravgrav1.8.0any

References 2

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

Remediation

  • github.com https://github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458
    Patch