Input validation vulnerability in Responsive Progress Bar 1.0

The Responsive Progress Bar plugin for WordPress has a security issue that could allow hackers to inject harmful code into certain pages. This could happen if the plugin is not updated to version 1.0 or higher. The problem is caused by the plugin not properly checking and filtering user input. As a result, attackers with contributor-level access or higher could add their own code to a page, which will then be executed whenever someone visits that page.