CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-44223
Critical (9.8) in wordpress wordpress. EPSS 29% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 29% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- wordpress:wordpress
References
- https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/
- https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/
- https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/
- https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/