CVE-2021-44223

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.

CVSS v3.1 NVD

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

CVSS v3.1 MITRE

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

28.98% chance of exploitation in the next 30 days, 98th percentile

Published

2021-11-25

Updated

2024-08-04

Proof-of-concept exploits (1)

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

Security advisories

• https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpr…
• https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned

References

• CVE Record
• NVD entry