Authorization bypass through user-controlled key in Grav CMS - CVE-2025-66306
Published: May 5, 2026
Vulnerability identifier: #VU130057
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-66306
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the /admin/accounts/users/{username} endpoint when handling requests for another user's account details. A remote user can send a request for another user's account page to disclose sensitive information.
Sensitive data may still be present in the response source even when the application returns an HTTP 403 response.
Affected software
Grav CMS
How to mitigate CVE-2025-66306
Install security update from vendor's website.
Grav CMS - update to 1.8.0 beta.27