The WPFunnels plugin for WordPress, which helps build funnels for websites, has a security issue called Reflected Cross-Site Scripting. This means that the plugin is not properly checking the information it receives and is not protecting against harmful code being included in a webpage. This could allow attackers to insert their own code and potentially harm users who click on certain links. The issue was partially fixed in version 3.5.4 and completely fixed in version 3.5.5.