CVE-2023-40555: Uxthemes Flatsome

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

Deserialization of Untrusted Data vulnerability in UX-themes Flatsome | Multi-Purpose Responsive WooCommerce Theme.This issue affects Flatsome | Multi-Purpose Responsive WooCommerce Theme: from n/a through 3.17.5.

Affected products

• Uxthemes Flatsome: before 3.17.6 (fixed in 3.17.6)

Published 2023-12-20. Last modified 2026-06-17.