The IQ Testimonials plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'process_image_upload' function in versions up to, and including, 2.2.7. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. This can only be exploited if the 'gd' php extension is not loaded on the server.

This is not a tutorial for absolute beginners on how to get started with programming assembly, or a “assembly for dummies” guide. Rather, it is a set of notes and observations I have made while on my own journey into the Microsoft x64 calling conventions that I hope will be useful to others who attempt the same path. Especially since there seems to a dearth of useful information out there regarding some of the stumbling blocks I've come across.