CVE-2026-40321
DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
8.0
HIGH
CVSS 3.1
EPSS 0.02%
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.
How to fix CVE-2026-40321
To remediate CVE-2026-40321, upgrade the affected package to a fixed version below.
- —upgrade to 10.2.2 or later
Is CVE-2026-40321 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 10.2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H |