WordPress and WordPress plugin are both products of the WordPress Foundation. WordPress is a blogging platform developed using the PHP language. WordPress plugin is an application plugin. versions of the WordPress Very Simple Contact Form plugin prior to 11.6 have a CAPTCHA bypass vulnerability, which stems from the fact that the CAPTCHA is exposed in the rendered contact form and an attacker could exploit this vulnerability to make it easy to bypass the CAPTCHA check and make the page a possible target for spambots.