Auth bypass in Getgrav Grav
CVE-2025-66301
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.013 (70.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · 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-v8x2-fjv7-8hjh (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66301?
- CVE-2025-66301 is a critical-severity vulnerability in Getgrav Grav, classified under Improper Authorization. CVSS score: 9.6/10. Published 2025-12-01.
- How severe is CVE-2025-66301?
- Critical severity. CVSS v3 base score is 9.6 out of 10.
- Is CVE-2025-66301 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.