Input validation vulnerability in Async JavaScript 2.20.12.09

The Async Javascript plugin for WordPress has a security flaw that can allow an attacker to inject malicious code into a page. This code will be executed anytime someone visits the page. To fix this, you need to make sure you have the latest version of the plugin (2.20.12.09) or a newer version. This version has input sanitization and output escaping, which will prevent the malicious code from being injected.