CVE-2021-40109

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    CVE-2021-40109

    Published: 27 Sept 2021Last Modified: 8 Jul 2026

    Summary:

    Details: A SSRF issue was discovered in Concrete CMS through 8.5.5. Users can access forbidden files on their local network. A user with permissions to upload files from external sites can upload a URL that redirects to an internal resource of any file type. The redirect is followed and loads the contents of the file from the redirected-to server. Files of disallowed types can be uploaded.

    References: https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes, https://hackerone.com/reports/1102105

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -f9c8e08d3651a250f42e0c0a8cc18bc64b42733f

    Affected versions

    8.4.1

    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
    CVE-2021-40109 | CVE-DB