How severe is CVE-2025-66311?

CVE-2025-66311 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-66311 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66311?

CVE-2025-66311 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66311?

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

Does CVE-2025-66311 have an EU (EUVD) identifier?

Yes. CVE-2025-66311 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200099.

When was CVE-2025-66311 published?

CVE-2025-66311 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-66311

CVE-2025-66311 is a medium-severity vulnerability in Getgrav Grav-plugin-admin with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v4: 6.2
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200099
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 Stored 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][metadata], data[header][taxonomy][category], and data[header][taxonomy][tag] parameters. These scripts are stored in the page frontmatter and executed automatically whenever the affected page is accessed or rendered in the administrative interface. This vulnerability is fixed in 1.11.0-beta.1.

Frequently asked questions

What is CVE-2025-66311?: 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 Stored 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][metadata], data[header][taxonomy][category], and data[header][taxonomy][tag] parameters. These scripts are stored in the page frontmatter and executed automatically whenever the affected page is accessed or rendered in the administrative interface. This vulnerability is fixed in 1.11.0-beta.1.
How severe is CVE-2025-66311?: CVE-2025-66311 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66311 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66311?: CVE-2025-66311 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66311?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66311 have an EU (EUVD) identifier?: Yes. CVE-2025-66311 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200099.
When was CVE-2025-66311 published?: CVE-2025-66311 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:*:*:*:*:*:*:*:*

More vulnerabilities in Getgrav Grav-plugin-admin

CVE-2021-21425 — Critical (CVSS 9.3): Grav Admin Plugin is an HTML user interface that provides a way to configure Grav and create and modify pages. In…
CVE-2025-66307 — Medium (CVSS 6.5): This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create…
CVE-2025-66309 — Medium (CVSS 6.1): This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create…
CVE-2025-66312 — Medium (CVSS 5.4): This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create…
CVE-2025-66310 — Medium (CVSS 5.4): This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create…
CVE-2025-66308 — Medium (CVSS 5.4): This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create…

All CVEs affecting Getgrav Grav-plugin-admin →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →