WordPress plugin iQ Block Country IP spoofing attack vulnerability

WordPress is a set of blogging platform developed using the PHP language. The platform supports setting up personal blog sites on servers with PHP and MySQL. iQ Block Country version 1.2.13 and earlier versions of the WordPress plugin are vulnerable to IP spoofing attacks, which stem from not properly checking the HTTP header to verify the source IP address. An attacker could exploit this vulnerability to bypass its blocking functionality by spoofing the header.