CVE-2025-48378: Dnn.Platform vulnerable to Stored Cross-Site Scripting (XSS) with svg files rendered inline

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-23 · updated 2026-06-17
Weakness: CWE-79

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 9.13.9, uploaded SVG files could contain scripts and if rendered inline those scripts could run allowing XSS attacks. Version 9.13.9 fixes the issue.

Affected products

DotNetNuke CMS Fixed in 9.1.1: before 9.13.9 — fixed in 9.13.9

How to fix

Upgrade to a fixed version: DotNetNuke CMS Fixed in 9.1.1 9.13.9. Check the vendor advisory for mitigations.

References

https://github.com/dnnsoftware/Dnn.Platform/commit/cfed83c291d5e5072b2fa70924a8b7c35b1cdf9e
https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-m4hf-fxcg-cp34

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