CVE-2026-40321
High
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.
SeverityHigh
CVSS8.0
Exploit probability—
ProductDnnsoftware Dotnetnuke
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-87CWE-87
How to fix
Update
- dnnsoftware dotnetnuke10.2.2 or later
- DotNetNuke.Core10.2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dnnsoftware dotnetnuke | v < 10.2.2 | 10.2.2 |
| DotNetNuke.CoreNuGet | v < 10.2.2 | 10.2.2 |
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