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CVE-2025-66308

21
FAUCET Score

CVE-2025-66308 describes a stored Cross-Site Scripting (XSS) vulnerability in the Grav admin plugin, affecting versions prior to 1.11.0-beta.1. Attackers can inject malicious scripts into the data[taxonomies] parameter at the /admin/config/site endpoint, which are then persistently stored and executed in the browsers of users accessing the site configuration. This medium-severity vulnerability (CVSS 5.4) has a low attack complexity and requires user interaction, potentially leading to limited impact on confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.10.50CPE matchmatch criteria
cpe:2.3:a:getgrav:grav-plugin-admin:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.8MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
HIGH
User Interaction
ACTIVE
VS Confidentiality
HIGH
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
HIGH
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
8.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 7th percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: getgrav/gravFixed in: 1.8.0-beta.27
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-gqxx-248x-g29fmedium

Grav Admin Plugin vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/config/site` parameter `data[taxonomies]`

Dec 2, 2025

References

github.com / getgrav/grav-plugin-admin/commit/99f653296504f1d6408510dd2f6f20a45a26f9b0
Patch
github.com / getgrav/grav/security/advisories/GHSA-gqxx-248x-g29f
ExploitVendor Advisory