CVE-2026-40321— DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
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I. Basic Information for CVE-2026-40321
Vulnerability Information
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Vulnerability Title
DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
Source: NVD (National Vulnerability Database)
Vulnerability Description
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.2.2, a user could upload a specially crafted SVG file that could include scripts that can target both authenticated and unauthenticated DNN users. The impact is increased if the scripts are run by a power user. Version 10.2.2 patches the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
替代XSS语法转义处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
DNN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DNN（又名DotNetNuke）是美国DNN公司的一套由微软支持、基于ASP.NET平台的开源内容管理系统（CMS）。该系统具有易于安装、可扩展、功能丰富等特点。 DNN 10.2.2之前版本存在安全漏洞，该漏洞源于对上传的SVG文件处理不当，可能导致跨站脚本攻击。
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 |
|---|---|---|---|---|
| dnnsoftware | Dnn.Platform | < 10.2.2 | - |
II. Public POCs for CVE-2026-40321
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · dnnsoftware · 2026-04-17 · 3 CVEs total
| CVE-2026-40305 | 4.3 MEDIUM | DNN has Force Friend Request Acceptance |
| CVE-2026-40306 | DNN has same HostGUID for all new installs |
IV. Related Vulnerabilities
Same product: Dnn.Platform
- CVE-2026-40306
DNN has same HostGUID for all new installs - CVE-2026-40305
DNN has Force Friend Request Acceptance - CVE-2026-24838
DotNetNuke.Core Vulnerable to Stored XSS via Module Title - CVE-2026-24837
DotNetNuke.Core Vulnerable to Stored XSS in Module Deletion - CVE-2026-24836
DotNetNuke.Core Vulnerable to Stored XSS in Scheduler LogNot
Same vendor: dnnsoftware
- CVE-2026-40306
DNN has same HostGUID for all new installs - CVE-2026-40305
DNN has Force Friend Request Acceptance - CVE-2020-37103
DotNetNuke 9.5 - Persistent Cross-Site Scripting - CVE-2026-24838
DotNetNuke.Core Vulnerable to Stored XSS via Module Title - CVE-2026-24837
DotNetNuke.Core Vulnerable to Stored XSS in Module Deletion
Same weakness: CWE-87
V. Comments for CVE-2026-40321
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