CVE-2018-20149

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    CVE-2018-20149

    Published: 14 Dec 2018Last Modified: 8 Jul 2026

    Summary:

    Details: In WordPress before 4.9.9 and 5.x before 5.0.1, when the Apache HTTP Server is used, authors could upload crafted files that bypass intended MIME type restrictions, leading to XSS, as demonstrated by a .jpg file without JPEG data.

    References: http://www.securityfocus.com/bid/106220, https://codex.wordpress.org/Version_4.9.9, https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html, https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/, https://wordpress.org/support/wordpress-version/version-5-0-1/, https://wpvulndb.com/vulnerabilities/9175, https://www.debian.org/security/2019/dsa-4401, https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/, https://github.com/WordPress/WordPress/commit/246a70bdbfac3bd45ff71c7941deef1bb206b19a

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8d87e4a8b8aa7d66a4f5dd3795b5450fa0b76af0

    Affected versions

    4.9.8

    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