CVE-2026-24838: DotNetNuke.Core Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-w9pf-h6m6-v89h
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CVSS 9.1
CWE-79
Published
Advisory Summary

CVE-2026-24838 is a CRITICAL (CVSS 9.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting DotNetNuke.Core libraries in the NuGet ecosystem. The issue involves dotnetnuke.core vulnerable to stored xss via module title. Remediation is available by upgrading affected packages to version 9.13.10, 10.2.0.

CVE-2026-24838 at a Glance

CVE Identifier CVE-2026-24838
GHSA Identifier GHSA-w9pf-h6m6-v89h
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product DotNetNuke.Core
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).

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

How to Fix CVE-2026-24838

To remediate this vulnerability, upgrade all affected DotNetNuke.Core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

DotNetNuke.Core fixed: 9.13.10 
Upgrade DotNetNuke.Core to 9.13.10
DotNetNuke.Core fixed: 10.2.0 
Upgrade DotNetNuke.Core to 10.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for DotNetNuke.Core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-24838, inspect your project dependencies for DotNetNuke.Core:

inspect dependencies for DotNetNuke.Core

Analyze the terminal output to locate any version of DotNetNuke.Core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 9.13.10), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In DotNetNuke.Core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Module title supports richtext which could include scripts that would execute in certain scenarios.

CVE-2026-24838 Affected DotNetNuke.Core Versions

2 component(s)
Fixed Versions:
9.13.1010.2.0
Product / Package Ecosystem Affected Versions Fixed Version
DotNetNuke.Core
nuget/DotNetNuke.Core
NuGet
< 9.13.10
9.13.10
DotNetNuke.Core
nuget/DotNetNuke.Core
NuGet
≥ 10.0.0
< 10.2.0
10.2.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-w9pf-h6m6-v89h
NVD — CVE-2026-24838 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24838
Security Fix Commit FIX COMMIT
https://github.com/dnnsoftware/Dnn.Platform/commit/4a4bcbcdf3cedbf702816f8168c4d51bf688f7f6
DotNetNuke.Core Source Repository REPOSITORY
https://github.com/dnnsoftware/Dnn.Platform
DotNetNuke.Core Release RELEASE
https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.0

Frequently Asked Questions

What is CVE-2026-24838?
CVE-2026-24838 is a security vulnerability in DotNetNuke.Core involving DotNetNuke.Core Vulnerable to Stored XSS via Module Title under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which DotNetNuke.Core versions are affected?
Affected versions include releases prior to 9.13.10, 10.2.0 across affected packages: DotNetNuke.Core.
What version fixes CVE-2026-24838?
Upgrading to 9.13.10, 10.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is DotNetNuke.Core affected?
Yes, DotNetNuke.Core is affected in releases prior to 9.13.10, 10.2.0. Upgrade your dependency to 9.13.10, 10.2.0 or later.
What is the CVSS score of CVE-2026-24838?
CVE-2026-24838 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-24838?
CVE-2026-24838 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check NuGet dependencies for CVE-2026-24838?
Run the dependency tree command: 'inspect dependencies for DotNetNuke.Core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w9pf-h6m6-v89h",
  "modified" : "2026-01-28T21:34:02Z",
  "published" : "2026-01-28T21:34:02Z",
  "aliases" : [ "CVE-2026-24838" ],
  "summary" : "DotNetNuke.Core Vulnerable to Stored XSS via Module Title",
  "details" : "Module title supports richtext which could include scripts that would execute in certain scenarios.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "DotNetNuke.Core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "9.13.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "DotNetNuke.Core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-w9pf-h6m6-v89h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-24838"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dnnsoftware/Dnn.Platform/commit/4a4bcbcdf3cedbf702816f8168c4d51bf688f7f6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/dnnsoftware/Dnn.Platform"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-28T21:34:02Z",
    "nvd_published_at" : "2026-01-28T01:16:14Z"
  }
}