CVE-2025-66843: Grav is vulnerable to Stored XSS through authenticated user-edited content

December 15, 2025 (updated December 17, 2025)

grav before v1.7.49.5 has a Stored Cross-Site Scripting (Stored XSS) vulnerability in the page editing functionality. An authenticated low-privileged user with permission to edit content can inject malicious JavaScript payloads into editable fields. The payload is stored on the server and later executed when any other user views or edits the affected page.

References

github.com/Yohane-Mashiro/grav_cve/issues/1
github.com/advisories/GHSA-mh85-44c2-3m97
github.com/getgrav/grav
nvd.nist.gov/vuln/detail/CVE-2025-66843

Code Behaviors & Features

Detect and mitigate CVE-2025-66843 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →