Avada <= 7.11.1 - Authenticated(Contributor+) Arbitrary File Upload via 'ajax_import_options'

The Avada theme for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'ajax_import_options' function in versions up to, and including, 7.11.1. This makes it possible for authenticated attackers with contributor permissions to upload arbitrary files on the affected site's server which may make remote code execution possible if they are able to successfully exploit a race condition.

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Avada 7.11.2 closes this, and updating the theme is the step that ends it.

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