CVE-2023-45367

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    CVE-2023-45367

    Published: 9 Oct 2023Last Modified: 12 Aug 2026

    Summary:

    Details: An issue was discovered in the CheckUser extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. A user can use a rest.php/checkuser/v0/useragent-clienthints/revision/ URL to store an arbitrary number of rows in cu_useragent_clienthints, leading to a denial of service.

    References: https://phabricator.wikimedia.org/T344923, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45367.json, https://nvd.nist.gov/vuln/detail/CVE-2023-45367

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ee574ec7a22fd0c77f86565fb6b8a31572d8b4fc

    Affected versions

    1.40.0-NA
    1.40.0

    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-2023-45367 | CVE-DB