GHSA-jj46-9cgh-qmfx

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    GHSA-jj46-9cgh-qmfx

    Published: 27 Nov 2023Last Modified: 10 Sept 2026

    Summary: Mattermost Improper Access Control vulnerability

    Details: Mattermost fails to check if hardened mode is enabled when overriding the username and/or the icon when posting a post. If settings allowed integrations to override the username and profile picture when posting, a member could also override the username and icon when making a post even if the Hardened Mode setting was enabled

    References: https://nvd.nist.gov/vuln/detail/CVE-2023-47865, https://github.com/mattermost/mattermost, https://mattermost.com/security-updates

    Affected packages

    Package

    Name: github.com/mattermost/mattermost/server/v8

    Purl: pkg:golang/github.com/mattermost/mattermost/server/v8

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -8.1.4

    Affected versions

    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
    GHSA-jj46-9cgh-qmfx | CVE-DB