BIT-wordpress-multisite-2021-29447

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    BIT-wordpress-multisite-2021-29447

    Published: 6 Mar 2024Last Modified: 10 Sept 2026

    Summary: WordPress Authenticated XXE attack when installation is running PHP 8

    Details: Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.

    References: http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html, http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html, https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/, https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh, https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html, https://wordpress.org/news/category/security/, https://www.debian.org/security/2021/dsa-4896, https://nvd.nist.gov/vuln/detail/CVE-2021-29447

    Affected packages

    Package

    Name: wordpress-multisite

    Purl: pkg:bitnami/wordpress-multisite

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 5.6.0
    Fixed -5.7.1

    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
    BIT-wordpress-multisite-2021-29447 | CVE-DB