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CVE-2026-18431 is a critical six-step vulnerability chain affecting Avada for WordPress through 7.16 when Fusion Builder through 3.16 is installed and active. Authorization, trust-boundary, input-validation, and file-handling weaknesses across the two components permit an unauthenticated attacker to write attacker-controlled content to the server. The resulting arbitrary file-write primitive can be used to create and execute PHP code, yielding remote code execution in the web-server security context.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVSS 9.8 critical, unauthenticated remote PHP code-execution vulnerability chain comprising six issues in the Avada WordPress theme and its Fusion Builder plugin. Exploitation requires vulnerable versions of both components to be active on the target site and could enable full website compromise.
An unauthenticated arbitrary-file-write vulnerability caused by chained authorization and input-validation weaknesses in the Avada WordPress theme and Fusion Builder plugin. Under required configuration and content conditions, it enables arbitrary PHP file creation and execution, resulting in remote code execution and complete site compromise.
A critical unauthenticated network-accessible arbitrary file write flaw caused by authorization and input-validation weaknesses spanning the Avada WordPress theme and Fusion Builder plugin. It permits attackers to create and execute PHP files, enabling remote code execution and full WordPress-site compromise. Exploitation also requires certain administrator-authored content to be present.
A critical CVSS 9.8 unauthenticated remote-code-execution chain in the Avada WordPress theme and Fusion Builder plugin. Six chained authorization, trust-boundary, input-validation, and file-handling weaknesses permit arbitrary file write and execution of attacker-controlled PHP on the web server.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.