CVE-2023-37267
CWE-284Published: July 13, 2023· Updated: Jun 17, 2026
Official Description
Umbraco is a ASP.NET CMS. Under rare conditions a restart of Umbraco can allow unauthorized users access to admin-level permissions. This vulnerability was patched in versions 10.6.1, 11.4.2 and 12.0.1.
Risk Analysis
Umbraco CMS is vulnerable to an issue where a restart can lead to unauthorized users gaining administrative access. The 9.8 CVSS score highlights the critical nature of this privilege escalation risk.
No public exploit is known, and the vulnerability is not in the CISA KEV. It is remotely exploitable with low complexity.
Upgrade Umbraco CMS to version 10.6.1, 11.4.2, 12.0.1, or later to mitigate the risk.
Technical Analysis
CVE-2023-37267 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (8)
Quick Facts
Related CVEs (CWE-284)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-37267 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts