Input validation vulnerability in List Children 2.1

The List Children plugin for WordPress has a security issue that allows attackers to inject harmful code into web pages. This can be done through the plugin’s ‘list_children’ feature, and affects all versions up to 2.1. This vulnerability occurs because the plugin does not properly clean and protect information provided by users. As a result, attackers with contributor-level access or higher can insert malicious code that will run whenever someone visits the affected web page.