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CVE-2025-66625— Umbraco Vulnerable to Improper File Access and Credential Exposure through Dictionary Import Functionality

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 CMS是丹麦Umbraco公司的一个内容管理系统。 Umbraco CMS 10.0.0版本至13.12.0版本存在安全漏洞，该漏洞源于临时文件处理不当，可能导致文件枚举攻击。

CVSS 4.9 · Medium EPSS 0.36% · P27
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I. Basic Information for CVE-2025-66625

Vulnerability Information
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Vulnerability Title
Umbraco Vulnerable to Improper File Access and Credential Exposure through Dictionary Import Functionality
Source: CVE Program / CVE List V5
Vulnerability Description
Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 13.12.0, during the dictionary upload process an attacker with access to the backoffice can trigger predictable requests to temporary file paths. The application’s error responses (HTTP 500 when a file exists, 404 when it does not) allow the attacker to enumerate the existence of arbitrary files on the server’s filesystem. This vulnerability does not allow reading or writing file contents. In certain configurations, incomplete clean-up of temporary upload files may additionally expose the NTLM hash of the Windows account running the Umbraco application. This issue is fixed in version 13.12.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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 CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Umbraco CMS是丹麦Umbraco公司的一个内容管理系统。 Umbraco CMS 10.0.0版本至13.12.0版本存在安全漏洞，该漏洞源于临时文件处理不当，可能导致文件枚举攻击。
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 10.0.0, < 13.12.1 -

II. Public POCs for CVE-2025-66625

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III. Intelligence Information for CVE-2025-66625

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Patches & Fixes for CVE-2025-66625 (1)

Vendor Advisories for CVE-2025-66625 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2025-66625

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