CVE-2026-1543: Themefusion Avada Fusion Builder

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 3.15.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator) accesses a page displaying dynamic user data (such as via the Dynamic Data feature pulling user biographical information).

Affected products

• Themefusion Avada Fusion Builder: up to and including 3.15.2

Published 2026-05-21. Last modified 2026-07-23.