[HIGH] Grav has Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions

PKSA-8gyx-1dyf-y75r CVE-2025-66301 GHSA-v8x2-fjv7-8hjh

Affected package: getgrav/grav

Affected version: <1.8.0-beta.27

Reported by:
GitHub