Improper access control in Umbraco CMS - CVE-2023-37267
Published: July 13, 2023 / Updated: May 5, 2026
Vulnerability identifier: #VU130183
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-37267
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain admin-level access to the backoffice.
The vulnerability exists due to improper access control in the backoffice installation mode when Umbraco is restarted while the database is unavailable and then the connection is re-established. A remote attacker can cause the application to boot into installation mode and reset admin credentials to gain admin-level access to the backoffice.
User interaction is required.
Affected software
Umbraco CMS
How to mitigate CVE-2023-37267
Install security update from vendor's website.
Umbraco CMS - addressed in versions 10.6.1, 11.4.2, 12.0.1