CVE-2025-66301: Getgrav Grav

Critical severity, CVSS 9.6. EPSS: 1.3% chance of exploitation in the next 30 days.

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.

Affected products

• Getgrav Grav: before 1.8.0 (fixed in 1.8.0); version 1.8.0 only

Published 2025-12-01. Last modified 2026-09-26.