CVE-2026-39573: Select-Themes Mildhill

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Mildhill <= 1.5 versions.

Affected products

• Select-Themes Mildhill: up to and including 1.5

Published 2026-06-17. Last modified 2026-06-17.