CVE-2026-4883 Piotnet Forms <= 2.1.40 - Unauthenticated Arbitrary File Upload via Form File Upload

The Piotnet Forms plugin for WordPress is vulnerable to arbitrary file upload due to missing file type validation in the 'piotnetformsajaxformbuilder' function in all versions up to, and including, 2.1.40. The plugin uses an incomplete extension blacklist that only blocks php, phpt, php5, php7, a...