The Avada theme for WordPress is vulnerable to Arbitrary File Write in all versions up to, and including, 7.16 when the Fusion Builder plugin is installed and active in versions up to, and including, 3.16. This is due to a chain of authorization and input validation weaknesses across the two components that makes it possible for unauthenticated attackers to write attacker-controlled files to the server. This can be used to create and execute arbitrary PHP files, resulting in remote code execution and complete site compromise. Successful exploitation requires both Avada and Fusion Builder to be installed and active, as well as certain administrator-authored content to be present.

The WordPress Avada Website Builder Theme installed on the remote host is affected by an Unauthenticated Arbitrary File Write due to a chain of authorization and input validation weaknesses.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

The WordPress Avada Fusion Builder Plugin installed on the remote host is affected by an Unauthenticated Arbitrary File Write due to a chain of authorization and input validation weaknesses.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
115455	Avada Website Builder Theme for WordPress < 7.16.1 Unauthenticated Arbitrary File Write	Web App Scanning	Component Vulnerability	Version Based	critical
115454	Avada Fusion Builder Plugin for WordPress < 3.16.1 Unauthenticated Arbitrary File Write	Web App Scanning	Component Vulnerability	Version Based	critical

Detections

Analytics

CVE-2026-18431

critical

Tenable Plugins

critical

critical