CVE-2017-5493: WordPress

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

wp-includes/ms-functions.php in the Multisite WordPress API in WordPress before 4.7.1 does not properly choose random numbers for keys, which makes it easier for remote attackers to bypass intended access restrictions via a crafted (1) site signup or (2) user signup.

Affected products

• WordPress WordPress: up to and including 4.7

Published 2017-01-15. Last modified 2026-06-17.