Input validation vulnerability in WP User Stylesheet Switcher v2.2.0

The WP User Stylesheet Switcher plugin for WordPress has a security vulnerability that could be exploited by hackers. This vulnerability affects all versions up to and including v2.2.0. The issue is caused by a missing or incorrect security check on a specific function. This means that unauthenticated attackers could potentially change settings and inject harmful code into a website by sending a fake request. They could do this by tricking a site administrator into clicking on a link.