CVE-2025-66301

Name: CVE-2025-66301
Creator: NVD / NIST
Published: 2025-12-01T22:15:49.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2025-66301 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS 4.0

8.6/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.23%

65.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-285

Affected Software

Vendor	Product	Versions	Update
Getgrav	Grav	< 1.8.0	—
Getgrav	Grav	1.8.0	Beta1

References

https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjhExploit, Third Party Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjhExploit, Third Party Advisory

Timeline

Published: Dec 1, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66301?

How severe is CVE-2025-66301?

CVE-2025-66301 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66301?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66301?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST