CVE-2023-37267— Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions
Quick assessment
Affected
umbraco Umbraco-CMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Umbraco是丹麦Umbraco公司的一套C#编写的开源的内容管理系统（CMS）。 Umbraco 10.6.1之前版本、11.4.2 之前版本和 12.0.1之前版本存在访问控制错误漏洞，该漏洞源于在极少数情况下，重新启动 Umbraco 可能会允许未经授权的用户访问管理员级别权限。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2023-37267
Vulnerability Information
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Vulnerability Title
Umbraco allows possible Admin-level access to backoffice without Auth under rare conditions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Umbraco 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Umbraco是丹麦Umbraco公司的一套C#编写的开源的内容管理系统（CMS）。 Umbraco 10.6.1之前版本、11.4.2 之前版本和 12.0.1之前版本存在访问控制错误漏洞，该漏洞源于在极少数情况下，重新启动 Umbraco 可能会允许未经授权的用户访问管理员级别权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| umbraco | Umbraco-CMS | >= 9.0.0, < 10.6.1 | - |
|
II. Public POCs for CVE-2023-37267
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-37267 (3)
Vendor Advisories for CVE-2023-37267 (1)
-
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-h8wc-r4jh-mg7m x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: Umbraco-CMS
-
CVE-2026-69197
Umbraco: Delivery API leaks protected (Public Access) conten -
CVE-2026-46609
Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confir -
CVE-2026-46616
Umbraco.Cms: Open Redirect Vulnerability in Surface Controll -
CVE-2026-31834
Umbraco Affected by Vertical Privilege Escalation via Missin -
CVE-2026-31833
Umbraco has Stored XSS in UFM Rendering Pipeline via Permiss
Same vendor: umbraco
-
CVE-2026-69197
Umbraco: Delivery API leaks protected (Public Access) conten -
CVE-2026-46609
Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confir -
CVE-2026-46616
Umbraco.Cms: Open Redirect Vulnerability in Surface Controll -
CVE-2026-31834
Umbraco Affected by Vertical Privilege Escalation via Missin -
CVE-2026-31833
Umbraco has Stored XSS in UFM Rendering Pipeline via Permiss
Same weakness: CWE-284
-
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V. Comments for CVE-2023-37267
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