RCE in Getgrav Grav
CVE-2025-66294
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.028 (86.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- Getgrav Grav — versions 1.8.0, < 1.8.0-beta.27
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/getgrav/grav/security/advisories/GHSA-662m-56v4-3r8f (Exploit, Vendor Advisory)
- github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458 (Patch)
Frequently asked questions
- What is CVE-2025-66294?
- CVE-2025-66294 is a high-severity vulnerability in Getgrav Grav, classified under Code Injection. CVSS score: 8.8/10. Published 2025-12-01.
- How severe is CVE-2025-66294?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-66294 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.