CVE-2026-16654: medium-severity vulnerability in themefusion Avada (Fusion) Builder
Avada (Fusion) Builder <= 3.15.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'size' Shortcode Attribute
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products
themefusion · Avada (Fusion) BuilderRelated CVEs — themefusion Avada (Fusion) Builder
In the same product, most dangerous first.
CVE-2026-6279CRITICALAvada (Fusion) Builder <= 3.15.2 - Unauthenticated Remote Code Execution via PHP Function Injection via 'render_logics' Shortcode Attribute via Widget AJAX HandlerEPSS 9.9%CVE-2026-8713CRITICALAvada (Fusion) Builder <= 3.15.3 - Unauthenticated Arbitrary File Deletion via Form Entry ValueEPSS 3.0%CVE-2026-18431CRITICALAvada <= 7.16 and Fusion Builder <= 3.16 - Unauthenticated Remote Code Execution via Arbitrary File WriteEPSS 0.9%CVE-2024-13345HIGHAvada Builder <= 3.11.13 - Unauthenticated Arbitrary Shortcode ExecutionEPSS 0.5%CVE-2026-4798HIGHAvada Builder <= 3.15.1 - Unauthenticated SQL Injection via 'product_order' ParameterEPSS 0.5%CVE-2026-4782MEDIUMAvada Builder <= 3.15.2 - Authenticated (Subscriber+) Arbitrary File Read via 'custom_svg' Shortcode ParameterEPSS 0.5%