CVE-2022-21663: Debian Linux

High severity, CVSS 7.2. EPSS: 3.7% chance of exploitation in the next 30 days.

WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. On a multisite, users with Super Admin role can bypass explicit/additional hardening under certain conditions through object injection. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 3.7.37. We strongly recommend that you keep auto-updates enabled. There are no known workarounds for this issue.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• WordPress WordPress: before 5.8.3 (fixed in 5.8.3)

Published 2022-01-06. Last modified 2026-06-17.