CVE-2026-16654
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'size' Shortcode Attribute in all versions up to, and including, 3.15.6 due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or above can inject arbitrary web scripts that execute whenever a user accesses an injected page.
Risk Assessment
An attacker can inject malicious scripts that execute in users' browsers, potentially leading to data theft, session hijacking, or other attacks.
Recommendation
Upgrade the Avada (Fusion) Builder plugin to the latest version that contains the fix for this vulnerability.
Other vulnerabilities in Avada (Fusion) Builder
See all- CVE-2026-12536Medium
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Module Title' parameter in all versions up to and including 3.15.5 due to insufficient input sanitization and output escaping.
- CVE-2026-1543Medium
The Avada (Fusion) Builder plugin for WordPress up to version 3.15.2 is vulnerable to stored XSS via multiple shortcodes due to insufficient input sanitization and output escaping.
Original NVD description (English source)
The Avada (Fusion) Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'size' Shortcode Attribute in all versions up to, and including, 3.15.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. WordPress's wp_kses_post filter does not neutralize the payload because the injected content resides entirely within a shortcode attribute string containing no HTML angle brackets, causing kses to pass it through unchanged at save time.