Input validation vulnerability in Knowledge Base 2.2.0

The Knowledge Base plugin for WordPress has a security issue called Stored Cross-Site Scripting. This means that in versions up to and including 2.2.0, the plugin does not properly clean up or protect against harmful code. As a result, attackers who are logged in with contributor-level access or higher can add their own malicious code to pages, which will then be activated whenever a user visits that page.