Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63407
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 16:18:37 UTC
Updated2026-08-25 03:16:56 UTC
DescriptionGrav 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.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Problem Types: CWE-942 | CWE-942 CWE-942: Permissive Cross-domain Policy with Untrusted Domains

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Getgrav Grav-plugin-api affected < 1.0.0-rc.16 Not specified

References

ReferenceSourceLinkTags
github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16 [email protected] github.com
github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20... [email protected] github.com
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