CVE-2025-48953— Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
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 14.0.0至15.4.2之前版本和16.0.0之前版本存在代码问题漏洞，该漏洞源于可通过操纵API请求上传不符合配置允许文件扩展名的文件。
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I. Basic Information for CVE-2025-48953
Vulnerability Information
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Vulnerability Title
Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
Source: CVE Program / CVE List V5
Vulnerability Description
Umbraco is an ASP.NET content management system (CMS). Starting in version 14.0.0 and prior to versions 15.4.2 and 16.0.0, it's possible to upload a file that doesn't adhere with the configured allowable file extensions via a manipulated API request. The issue is patched in versions 15.4.2 and 16.0.0. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Umbraco 代码问题漏洞
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至15.4.2之前版本和16.0.0之前版本存在代码问题漏洞，该漏洞源于可通过操纵API请求上传不符合配置允许文件扩展名的文件。
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, < 15.4.2 | - |
|
II. Public POCs for CVE-2025-48953
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Same vendor: umbraco
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Umbraco Affected by Vertical Privilege Escalation via Missin -
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Same weakness: CWE-434
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V. Comments for CVE-2025-48953
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