CVE-2026-58656
HIGHGrav API Plugin - Cross-Origin Admin Account Takeover via CORS Wildcard and JWT Query Parameter
Title source: cnaDescription
Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token from access logs, proxy logs, browser history, or Referrer headers can create persistent backdoor super-admin accounts and exfiltrate sensitive configuration and user data.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-hqm9-5xxw-4qxp)
https://github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp
Third Party Advisory third-party-advisory
VulnCheck Advisory: Grav API Plugin - Cross-Origin Admin Account Takeover via CORS Wildcard and JWT Query Parameter
https://www.vulncheck.com/advisories/grav-api-plugin-cross-origin-admin-account-takeover-via-cors-wildcard-and-jwt-query-parameter
Scores
CVSS v3
7.5
EPSS
0.0027
EPSS Percentile
19.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-598
Status
published
Products (1)
getgrav/grav
< 1.0.0-rc.15
Published
Jul 08, 2026
Tracked Since
Jul 08, 2026