CVE-2026-73380: Supsystic Popup By Supsystic

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Popup by Supsystic <= 1.13.0 versions.

Affected products

• Supsystic Popup By Supsystic: up to and including 1.13.0

Published 2026-08-18. Last modified 2026-08-20.