CVE-2025-66309: Grav is vulnerable to Cross-Site Scripting (XSS) Reflected endpoint /admin/pages/[page], parameter data[header][content][items], located in the "Blog Config" tab

December 2, 2025

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.

References

github.com/advisories/GHSA-65mj-f7p4-wggq
github.com/getgrav/grav
github.com/getgrav/grav-plugin-admin/commit/99f653296504f1d6408510dd2f6f20a45a26f9b0
github.com/getgrav/grav/security/advisories/GHSA-65mj-f7p4-wggq
nvd.nist.gov/vuln/detail/CVE-2025-66309

Code Behaviors & Features

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