CVE-2021-29447 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://wordpress.org/news/category/security/ https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html https://www.debian.org/security/2021/dsa-4896 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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5