Vulnerability Analysis
Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses
CVE-2026-63407
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.
No Active Exploit Signals
CVSS Base Score
8.2
HIGH
Exploitability:2.9
Impact Score:4.8
Temporal Score:-
EPSS:-
Threat Intelligence Signals
CISA KEV
No
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VulnCheck In-the-Wild
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Nuclei Template
No
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SSVC Exploitation
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SSVC Automatable
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Identity & Timeline
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| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
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| No affected products specified. | ||
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