CVE-2026-66596: Stefano Lissa Newsletter

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

Unauthenticated Cross Site Scripting (XSS) in Newsletter <= 9.3.3 versions.

Affected products

• Stefano Lissa Newsletter: up to and including 9.3.3

Published 2026-08-19. Last modified 2026-08-20.