CVE-2021-44223

Published: Nov 25, 2021Modified: Jun 17, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.

Affected (1)

Products: Wordpress: Wordpress

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Wordpress Wordpress	Before 5.8

References (4)

https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/

Source: cve@mitre.org

Release NotesVendor Advisory

https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/

Source: cve@mitre.org

ExploitThird Party Advisory

https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

Timeline

No history available yet.