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CVE-2026-40321

DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload

Published: Apr 17, 2026Updated: Apr 24, 2026 Sources: CVE List NVDCWE-87
NVD MITRE
8.0CVSSHIGH
EPSS Score
7.6%
Top 6.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-87

Affected Products

Dnn.Platformdnnsoftware
On-premWeb App
Web & CMS Plugins / cms-core
dotnetnukednnsoftware
On-premWeb App
Web & CMS Plugins / cms-core
dnnsoftwarecommercialWeb & CMS Pluginsaka dotnetnuke, dnn.platform, dnn platform

Exploitability

Official Patch Available

References

https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
github.com
https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
github.com

Timeline

Published
Apr 17, 2026
Last Updated
Apr 24, 2026

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