CVE-2026-40321: DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload

April 10, 2026 (updated April 24, 2026)

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.

References

github.com/advisories/GHSA-ffq7-898w-9jc4
github.com/dnnsoftware/Dnn.Platform
github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
nvd.nist.gov/vuln/detail/CVE-2026-40321

Code Behaviors & Features

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