Vulnerability Description
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20
- https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16
- https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2
- https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2
FAQ
What is CVE-2026-63407?
CVE-2026-63407 is a vulnerability with a CVSS score of 8.2 (HIGH). Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: *...
How severe is CVE-2026-63407?
CVE-2026-63407 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63407?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.