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.NET CVE-2026-24838

CRITICAL
Cross-site Scripting (XSS) (CWE-79)
2026-01-28 security-advisories@github.com GHSA-w9pf-h6m6-v89h
.NET Dotnetnuke
9.1
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 28, 2026 - 01:16 nvd
CRITICAL 9.1

DescriptionGitHub Advisory

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 scenarios. Versions 9.13.10 and 10.2.0 contain a fix for the issue.

AnalysisAI

DNN (DotNetNuke) CMS has a stored XSS vulnerability (CVSS 9.1) allowing persistent script injection that executes for all users viewing the affected content.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Admin accesses module settings
Exploit
Enter malicious script in module title field
Execution
Script executes in user browsers
Impact
Steal session tokens or modify page content
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Vulnerability AssessmentAI

Exploitation Attacker must have high-privilege admin credentials (PR:H) in DNN CMS versions before 9.13.10 or 10.2.0. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.1 — DNN is a major .NET CMS used by enterprises and government organizations. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker injects malicious JavaScript into a DNN page or content module. Every visitor's browser executes the script, which steals session cookies and sends them to the attacker, enabling mass account takeover.
Remediation Update DNN. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all DNN installations and their versions; disable or restrict access to module title editing features. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-24838 vulnerability details – vuln.today
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