GoKawiilAvada WordPress theme flaw allows unauthenticated remote code execution
Wordfence researchers found a critical vulnerability chain, tracked as CVE-2026-18431 with a 9.8 severity score, in the Avada theme and its companion Fusion Builder plugin for WordPress. By chaining six separate weaknesses in a specific sequence, an attacker with no login credentials could execute arbitrary PHP code on a vulnerable server, fully compromising the site.
GoKawiil's interpretation of the reporting above, not reported fact.
Full server compromise could let attackers plant malware, steal database contents, redirect site visitors, or create rogue admin accounts, all without needing any authentication. Avada has sold more than a million licenses, making it one of WordPress's most widely used premium themes, though exploitation only works when both the vulnerable theme and Fusion Builder plugin are active together, which limits the actual number of exposed sites.
- ThemeFusion has already patched the flaw in Avada and Fusion Builder, and site owners should update immediately.
- Exploitation requires no authentication and chains six separate bugs in a precise order to achieve code execution.
- Wordfence withheld full technical details to give administrators time to patch before public disclosure invites attacks.
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Published there as: “Critical Avada WordPress theme flaw enables zero-click RCE”
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