CVE-2020-28037: Debian Linux

Critical severity, CVSS 9.8. EPSS: 8.1% chance of exploitation in the next 30 days.

is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 improperly determines whether WordPress is already installed, which might allow an attacker to perform a new installation, leading to remote code execution (as well as a denial of service for the old installation).

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 31 only; version 32 only; version 33 only
• WordPress WordPress: before 5.5.2 (fixed in 5.5.2)

Published 2020-11-02. Last modified 2026-06-17.