CVE-2025-66301: getgrav grav Improper Authorization

Vulnerability summary

CVE-2025-66301 is a critical (CVSS 9.6) Improper Authorization vulnerability in getgrav grav. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 70.8% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 01-12-2025
   PublishedVulnerability first disclosed.
2. 02-12-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.