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).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 31, 2020 |
| Debian | — | Upgrade wordpress | Nov 4, 2020 | Nov 2, 2020 |
| Wordpress | — | Upgrade Wordpress to version 5.5.2 | Nov 11, 2020 | Nov 2, 2020 |
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