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CVE-2025-24011— Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

Quick assessment

Affected
umbraco Umbraco-CMS
Exploitation
Public or AI PoC available; prioritize validation
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 14.0.0及之前版本存在信息泄露漏洞，该漏洞源于可以根据对响应代码和 Umbraco 管理 API 响应时间的分析来确定帐户是否存在。

CVSS 5.3 · Medium EPSS 1.52% · P74

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-24011

Vulnerability Information
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Vulnerability Title
Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes
Source: CVE Program / CVE List V5
Vulnerability Description
Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and 15.1.2 contain a patch. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Umbraco 信息泄露漏洞
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 14.0.0及之前版本存在信息泄露漏洞，该漏洞源于可以根据对响应代码和 Umbraco 管理 API 响应时间的分析来确定帐户是否存在。
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 >= 14.0.0, < 14.3.2 -

II. Public POCs for CVE-2025-24011

# POC Description Source Link Shenlong Link
1 Umbraco User Enum - CVE-2025-24011 PoC https://github.com/Puben/CVE-2025-24011-PoC POC Details
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III. Intelligence Information for CVE-2025-24011

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Patches & Fixes for CVE-2025-24011 (2)

Vendor Advisories for CVE-2025-24011 (1)

IV. Related Vulnerabilities

Same product: Umbraco-CMS
Same vendor: umbraco
Same weakness: CWE-200

V. Comments for CVE-2025-24011

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