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    CVE-2026-40321

    DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.2.2, a user could upload a specially crafted SVG file that could include scripts that can target both authenticated and unauthenticated DNN users. The impact is increased if the scripts are run by a power user. Version 10.2.2 patches the issue.

    Published:Apr 17, 2026
    Last Modified:Apr 24, 2026
    EPS:Apr 17, 2026
    EPSS Score:0.00042
    CVSS Score:8.1

    Affected Products

    Vendor
    Dnnsoftware
    Product
    Dnn Platform
    Vendor
    Dnnsoftware
    Product
    Dotnetnuke

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-199 XSS Using Alternate Syntax

    Related CVEs

    CVE-2026-40306 (CVSS 6.9) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-40305 (CVSS 4.3) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-24838 (CVSS 9.1) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-24837 (CVSS 7.6) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-24836 (CVSS 7.6) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-24833 (CVSS 7.6) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2026-24784 (CVSS 6.8) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2025-64095 (CVSS 10) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2025-64094 (CVSS 6.4) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …
    CVE-2025-62802 (CVSS 4.3) — DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High