GHSA-fpcr-4rr5-hpcp

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    GHSA-fpcr-4rr5-hpcp

    Published: 24 May 2022Last Modified: 19 Feb 2026

    Summary: Mattermost Server vulnerable to user account takeover when Single Sign-On OAuth2 is used

    Details: An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2, when Single Sign-On OAuth2 is used. An attacker could claim somebody else's account.

    References: https://nvd.nist.gov/vuln/detail/CVE-2017-18906, https://github.com/mattermost/mattermost/commit/259ad46f30d0fac2f7c5c14f3b76b2170f7e90c7, https://github.com/mattermost/mattermost/commit/b17fca0d5ee7557e3df1cf1d1da8bd749859e35f, https://github.com/mattermost/mattermost/commit/fbc170733e86f09b46ba754dd03304733d2f482f, https://github.com/mattermost/mattermost, https://mattermost.com/security-updates

    Affected packages

    Package

    Name: github.com/mattermost/mattermost-server

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

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -3.9.2-0.20170714134023-b17fca0d5ee7

    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-fpcr-4rr5-hpcp | CVE-DB