What is CVE-2026-24838?

CVE-2026-24838 is a critical-severity vulnerability in Dnnsoftware Dnn.platform, classified under Cross-site Scripting. CVSS score: 9.1/10. Published 2026-01-27.

How severe is CVE-2026-24838?

Critical severity. CVSS v3 base score is 9.1 out of 10.

XSS in Dnnsoftware Dnn.platform

CVE-2026-24838

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to versions 9.13.10 and 10.2.0, module title supports richtext which could include scripts that would execute in certain s…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Dnnsoftware Dnn.platform — versions < 9.13.10, >= 10.0.0, < 10.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-w9pf-h6m6-v89h (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-24838?: CVE-2026-24838 is a critical-severity vulnerability in Dnnsoftware Dnn.platform, classified under Cross-site Scripting. CVSS score: 9.1/10. Published 2026-01-27.
How severe is CVE-2026-24838?: Critical severity. CVSS v3 base score is 9.1 out of 10.