CVE-2026-66705: Facebook For WordPress

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Unauthenticated Cross Site Scripting (XSS) in Facebook for WordPress <= 5.2.1 versions.

Affected products

• Facebook Facebook For WordPress: up to and including 5.2.1

Published 2026-08-06. Last modified 2026-08-12.