Input validation vulnerability in Simple Shortcodes 1.0.20

The Simple Shortcodes plugin for WordPress is not secure in versions up to, and including, 1.0.20. This means that people with a certain level of access to the website can add malicious code to certain pages. This code can be used to access certain information from the website when someone visits the page with the malicious code. It is important to update to a more secure version of the plugin in order to protect your website.