Input validation vulnerability in Fitness Park 1.1.1

The WordPress theme called Fitness Park has a security issue where it is vulnerable to an attack called Stored Cross-Site Scripting. This can happen in versions 1.1.1 and below because the theme does not properly clean up or protect against harmful code. This means that someone who has contributor-level access or higher can add dangerous code to a page, and when someone else views that page, the code will run without their knowledge.