How severe is CVE-2025-66309?

CVE-2025-66309 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-66309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66309?

CVE-2025-66309 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66309 have an EU (EUVD) identifier?

Yes. CVE-2025-66309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200101.

When was CVE-2025-66309 published?

CVE-2025-66309 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-66309

CVE-2025-66309 is a medium-severity vulnerability in Getgrav Grav-plugin-admin with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 6.2
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200101
Weakness: CWE-79
Affected product: Getgrav Grav-plugin-admin
Published: 2025-12-01
Last modified: 2026-06-17

Description

This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.11.0-beta.1, a Reflected Cross-Site Scripting (XSS) vulnerability was identified in the /admin/pages/[page] endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[header][content][items] parameter. This vulnerability is fixed in 1.11.0-beta.1.

Frequently asked questions

What is CVE-2025-66309?: This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.11.0-beta.1, a Reflected Cross-Site Scripting (XSS) vulnerability was identified in the /admin/pages/[page] endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[header][content][items] parameter. This vulnerability is fixed in 1.11.0-beta.1.
How severe is CVE-2025-66309?: CVE-2025-66309 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66309?: CVE-2025-66309 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66309 have an EU (EUVD) identifier?: Yes. CVE-2025-66309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200101.
When was CVE-2025-66309 published?: CVE-2025-66309 was published on 2025-12-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getgrav:grav-plugin-admin:*:*:*:*:*:*:*:*

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