CVE-2025-49940: Themefusion Fusion Builder

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeFusion Fusion Builder fusion-builder allows DOM-Based XSS.This issue affects Fusion Builder: from n/a through <= 3.13.2.

Affected products

• Themefusion Fusion Builder: up to and including 3.13.2

Published 2025-10-22. Last modified 2026-10-08.