Category Image <= 2.0 - Authenticated (Editor+) Stored Cross-Site Scripting via 'tag-image' Parameter

The Category Image plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tag-image' parameter in all versions up to, and including, 2.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.