CRITICAL

CVE-2025-66301

CVSS v3

9.6

CRITICAL

EPSS Score

1.3 %

exploit probability, as of 2026-10-03

CISA KEV

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published: 2025-12-01

Frequently asked questions

What is CVE-2025-66301?

Is CVE-2025-66301 actively exploited?

Active exploitation of CVE-2025-66301 has not been confirmed. Its EPSS score was 1.3% on 2026-10-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-66301?

CVE-2025-66301 has a CVSS v3 base score of 9.6 (CRITICAL severity).

Is CVE-2025-66301 affecting your environment?

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