Input validation vulnerability in Really Simple Under Construction Page 1.4.6

The plugin called Really Simple Under Construction Page for WordPress has a security issue called Stored Cross-Site Scripting. This is because it doesn’t properly clean the input and output data. This means that someone who is logged in and has administrative privileges can add harmful code to a page. This will run whenever someone opens that page. It only affects websites with multiple pages and websites that have disabled the unfiltered_html option.