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CVE-2023-49279— Umbraco CMS vulnerable to stored XSS via SVG File Upload

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 存在跨站脚本漏洞，该漏洞源于有权访问后台的用户可以上传包含脚本的 SVG 文件。 如果用户可以欺骗其他用户直接在浏览器中加载媒体，则可以执行脚本。

CVSS 3.7 · Low EPSS 0.39% · P31
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I. Basic Information for CVE-2023-49279

Vulnerability Information
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Vulnerability Title
Umbraco CMS vulnerable to stored XSS via SVG File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
Umbraco is an ASP.NET content management system (CMS). Starting in version 7.0.0 and prior to versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0, a user with access to the backoffice can upload SVG files that include scripts. If the user can trick another user to load the media directly in a browser, the scripts can be executed. Versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0 contain a patch for this issue. Some workarounds are available. Implement the server side file validation or serve all media from an different host (e.g cdn) than where Umbraco is hosted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Umbraco 跨站脚本漏洞
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 存在跨站脚本漏洞，该漏洞源于有权访问后台的用户可以上传包含脚本的 SVG 文件。 如果用户可以欺骗其他用户直接在浏览器中加载媒体，则可以执行脚本。
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 >= 7.0.0, < 7.15.11 -

II. Public POCs for CVE-2023-49279

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III. Intelligence Information for CVE-2023-49279

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Vendor Advisories for CVE-2023-49279 (1)

Other References for CVE-2023-49279 (1)

Same Patch Batch · umbraco · 2023-12-12 · 8 CVEs total

CVE-2023-49089 7.7 HIGH Umbraco CMS possible path traversal when creating packages from backoffice
CVE-2023-49273 5.4 MEDIUM Umbraco CMS vulnerable to Privilege Escalation using Spoofing
CVE-2023-49278 5.3 MEDIUM Umbraco CMS brute force exploit can be used to collect valid usernames
CVE-2023-48227 4.3 MEDIUM Umbraco CMS Backoffice User can bypass "Publish" restriction
CVE-2023-48313 4.3 MEDIUM Umbraco contains a DOM-XSS
CVE-2023-49274 3.7 LOW Umbraco CMS SMTP misconfiguration exposes potential registered user email
CVE-2023-38694 3.5 LOW Umbraco CMS vulnerable to possible injection of HTML in an unintended form

IV. Related Vulnerabilities

Same product: Umbraco-CMS
Same vendor: umbraco
Same weakness: CWE-79

V. Comments for CVE-2023-49279

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