WordPress - Fluent Boards Pro - CRITICAL - CVE-2026-78274. Fluent Boards Pro, a popular WordPress plugin, is susceptible to an arbitrary file upload vulnerability in versions up to 2.0.11. This flaw allows attackers to upload malicious files, potentially compromising the server and leading to unauthorized access. It is essential for users of Fluent Boards Pro to update to patched versions to mitigate this risk and safeguard their sites from potential exploitations.