CVE-2026-58656CWE-598

Grav API Plugin - Cross-Origin Admin Account Takeover via CORS Wildcard and JWT Query Parameter

High · published July 8, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
38.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00451 · 38.2th percentile
Weakness
CWE-598 · Use of HTTP Request With Sensitive Query String
Published
2026-07-08T13:49Z
EPSS history
Timeline
  • 08 JUL 13:49Z
    Grav API Plugin - Cross-Origin Admin Account Takeover via CORS Wildcard and JWT Query Parameter
    cvelistv5