CVE-2023-49279

    Dashboard / Vulnerabilities / CVE-2023-49279

    CVE-2023-49279

    Published: 12 Dec 2023Last Modified: 21 Oct 2026

    Summary: Umbraco CMS vulnerable to stored XSS via SVG File Upload

    Details: Umbraco is an ASP.NET content management system (CMS). Starting in version 7.0.0 and prior to versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0, a user with access to the backoffice can upload SVG files that include scripts. If the user can trick another user to load the media directly in a browser, the scripts can be executed. Versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0 contain a patch for this issue. Some workarounds are available. Implement the server side file validation or serve all media from an different host (e.g cdn) than where Umbraco is hosted.

    References: https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49279.json, https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-6xmx-85x3-4cv2, https://nvd.nist.gov/vuln/detail/CVE-2023-49279

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- f916a6bc18d2dfe6efafaa2b9d040f40b8c61a31
    Fixed -bd60f4e2cea7ace2984dcfb8e61ef6512ea77c73

    Affected versions

    release-12.2.0-rc

    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