All 404 Pages Redirect to Homepage < 2.0 - Unauthenticated Stored Cross-Site Scripting

Description

The All 404 Pages Redirect to Homepage plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters including IP address and 404 page URL in versions up to, and including, 1.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.