How severe is CVE-2025-66301?

CVE-2025-66301 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-66301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66301?

CVE-2025-66301 primarily affects Getgrav Grav. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66301?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-66301 have an EU (EUVD) identifier?

Yes. CVE-2025-66301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200109.

When was CVE-2025-66301 published?

CVE-2025-66301 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-66301

CVE-2025-66301 is a critical-severity vulnerability in Getgrav Grav with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v4: 8.6
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200109
Weakness: CWE-285
Affected product: Getgrav Grav
Published: 2025-12-01
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-66301?: 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.
How severe is CVE-2025-66301?: CVE-2025-66301 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-66301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66301?: CVE-2025-66301 primarily affects Getgrav Grav. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66301?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-66301 have an EU (EUVD) identifier?: Yes. CVE-2025-66301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200109.
When was CVE-2025-66301 published?: CVE-2025-66301 was published on 2025-12-01 and last updated on 2026-06-17.

References

https://github.com/getgrav/grav/security/advisories/GHSA-v8x2-fjv7-8hjh

Affected products (27)

cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta1:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta10:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta11:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta12:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta13:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta14:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta15:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta16:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta17:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta18:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta19:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta2:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta20:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta21:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta22:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta23:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta24:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta25:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta26:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta3:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta4:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta5:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta6:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta7:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta8:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:1.8.0:beta9:*:*:*:*:*:*

More vulnerabilities in Getgrav Grav

CVE-2023-34251 — Critical (CVSS 9.9): Grav is a flat-file content management system. Versions prior to 1.7.42 are vulnerable to server side template…
CVE-2021-47812 — Critical (CVSS 9.8): GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML…
CVE-2025-46199 — Critical (CVSS 9.8): Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to execute arbitrary code via a…
CVE-2026-42608 — Critical (CVSS 9.1): Grav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash…
CVE-2025-66844 — Critical (CVSS 9.1): In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is…
CVE-2026-42611 — High (CVSS 8.9): Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a low-privileged (with the ability to create a page) user can…

All CVEs affecting Getgrav Grav →

Other CWE-285 (Improper Authorization) vulnerabilities

CVE-2025-65041 — Critical (CVSS 10.0): Improper authorization in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.
CVE-2023-33189 — Critical (CVSS 10.0): Pomerium is an identity and context-aware access proxy. With specially crafted requests, incorrect authorization…
CVE-2022-2595 — Critical (CVSS 10.0): Improper Authorization in GitHub repository kromitgmbh/titra prior to 0.79.1.
CVE-2021-28799 — Critical (CVSS 10.0): An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If…
CVE-2026-34048 — Critical (CVSS 9.9): Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to…
CVE-2026-5412 — Critical (CVSS 9.9): In Juju versions prior to 2.9.57 and 3.6.21, an authorization issue exists in the Controller facade. An authenticated…

Browse all CWE-285 (Improper Authorization) vulnerabilities →