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Fencer Vulns
high 8.1

CVE-2026-40321 json

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

published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-24061 , GHSA-ffq7-898w-9jc4

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.4%
EPSS 6.4% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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.

Patch / fix

  • nuget DotNetNuke.Core 10.2.2
  • dnnsoftware dotnetnuke 10.2.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

6.41% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
GitHub 3.1 8.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget DotNetNuke.Core
<10.2.2
10.2.2

Affected products

  • dnnsoftware Dnn.Platform

Classification

Weakness
  • CWE-87 Improper Neutralization of Alternate XSS Syntax

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.