What is the CVSS score of CVE-2026-24838?

CVE-2026-24838 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-24838?

Within 24 hours: Identify all DNN installations and their versions; disable or restrict access to module title editing features. Within 7 days: Implement input validation and output encoding controls; deploy WAF rules to block script injection attempts in module parameters. Within 30 days: Plan and execute upgrade to DNN 9.13.10 or 10.2.0 once patch is released; conduct security assessment of affected systems for evidence of compromise.

Dotnetnuke CVE-2026-24838

CRITICAL

Cross-site Scripting (XSS) (CWE-79)

2026-01-28 security-advisories@github.com

GHSA-w9pf-h6m6-v89h

.NET Dotnetnuke Dnnsoftware

9.1

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

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

Vulnerability Assessment

Weakness	CWE CWE-79 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Output encoding, context-aware escaping MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Attacker must have high-privilege admin credentials (PR:H) in DNN CMS versions before 9.13.10 or 10.2.0. Module title richtext field must support script injection and execute in browser context.
Impact	CVSS 9.1 — DNN is a major .NET CMS used by enterprises and government organizations. Stored XSS enables mass credential harvesting and admin account takeover.
Exploit ScenarioDerived	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.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

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

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 9.1

Stored XSS in DNN CMS enables persistent script execution across the platform.

RemediationAI

Update DNN. Implement Content Security Policy headers. Audit existing content for injected scripts.

Affected Packages

nuget dotnetnuke.core fix: 9.13.10, 10.2.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in nuget

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

DNN (formerly DotNetNuke) has a CWE-79 stored cross-site scripting vulnerability that allows attackers to inject persistent JavaScript into CMS content that executes for every user who views the page.

Know when Dotnetnuke gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

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.

Executive ViewAI

Why It Matters

DNN (DotNetNuke) CMS installations are vulnerable to arbitrary script execution through module titles, allowing attackers to compromise website integrity and potentially steal user credentials or deploy malware. Organizations running DNN versions prior to 9.13.10 or 10.2.0 face immediate risk, with no vendor patch currently available.

Business Impact: Severe

Compensating Controls

Implement Web Application Firewall (WAF) rules to filter malicious scripts in module title parameters; restrict module title editing permissions to trusted administrators only; apply strict input validation and HTML sanitization to module title fields; disable richtext editing for module titles if business logic permits; segment DNN infrastructure from critical systems; enable detailed logging and monitoring of module configuration changes.

Threat Intelligence Overview

EPSS Score

0.0%

Top 90% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +46

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:*

More in Dotnetnuke

View all

CVE-2017-9822 HIGH Act Now POC

8.8 Jul 20

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code e

CVE-2015-2794 CRITICAL Act Now POC

9.8 Feb 06

The installation wizard in DotNetNuke (DNN) before 7.4.1 allows remote attackers to reinstall the application and gain S

CVE-2025-64095 CRITICAL Emergency POC

9.8 Oct 28

Unauthenticated attackers can upload and overwrite files in DNN Platform before 10.1.1 through the default HTML editor p

CVE-2025-52488 HIGH Act Now POC

8.6 Jun 21

DNN (DotNetNuke) CMS versions 6.0.0 through 10.0.0 contain a vulnerability that can expose NTLM hashes to a third-party

CVE-2020-5187 HIGH This Week POC

8.8 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 allows Path Traversal (issue 2 of 2). Rated high severity (CVSS 8.8), this vulne

CVE-2020-5188 MEDIUM This Month POC

6.5 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 has Insecure Permissions. Rated medium severity (CVSS 6.5), this vulnerability i

CVE-2020-37103 MEDIUM This Month POC

6.4 Feb 03

DotNetNuke 9.5 contains a persistent cross-site scripting vulnerability that allows normal users to upload malicious XML

CVE-2019-12562 MEDIUM This Month POC

6.1 Sep 26

Stored Cross-Site Scripting in DotNetNuke (DNN) Version before 9.4.0 allows remote attackers to store and embed the mali

CVE-2020-5186 MEDIUM This Month POC

5.4 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 allows XSS (issue 1 of 2). Rated medium severity (CVSS 5.4), this vulnerability

CVE-2025-59545 CRITICAL Act Now

9.0 Sep 23

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Rated crit

CVE-2022-2922 MEDIUM This Month POC

4.9 Sep 30

Relative Path Traversal in GitHub repository dnnsoftware/dnn.platform prior to 9.11.0. Rated medium severity (CVSS 4.9),

CVE-2013-4649 MEDIUM This Month POC

4.3 Mar 12

Cross-site scripting (XSS) vulnerability in DotNetNuke (DNN) before 6.2.9 and 7.x before 7.1.1 allows remote attackers t

Same weakness CWE-79 – Cross-site Scripting (XSS)

View all

CVE-2020-3580 MEDIUM POC

6.1

CVE-2013-7389 MEDIUM POC

4.3

CVE-2021-25299 MEDIUM POC

6.1

CVE-2014-2120 MEDIUM

6.1

CVE-2023-40000 HIGH POC

8.3

CVE-2016-8581 MEDIUM POC

6.1

CVE-2013-5223 MEDIUM POC

5.4

CVE-2025-52367 MEDIUM POC

5.4

References

Advisories & patches

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

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back