CVE-2026-40321 | THREATINT

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.

PUBLISHED Reserved 2026-04-10 | Published 2026-04-17 | Updated 2026-04-22 | Assigner GitHub_M

HIGH: 8.1CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-87: Improper Neutralization of Alternate XSS Syntax

Product status

< 10.2.2

affected

References

github.com/...atform/security/advisories/GHSA-ffq7-898w-9jc4

github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2

cve.org (CVE-2026-40321)

nvd.nist.gov (CVE-2026-40321)

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