Improper Authorization in baserCMS - CVE-2026-63012
Published: July 30, 2026
Vulnerability identifier: #VU140532
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-63012
CWE-ID: CWE-285
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 Api/Admin endpoints configured with auth => true when processing requests with session authentication fallback. A remote user can send a request with a Referer header to access the API without holding a JWT to disclose sensitive information.
The issue affects operator accounts whose default group has auth_prefix set to 'Admin', and exploitation relies on session authentication becoming active for the Api/Admin prefix.
Affected software
baserCMS
How to mitigate CVE-2026-63012
Install security update from vendor's website.
baserCMS - update to 5.3.0