Custom Field Template <= 2.6 is vulnerable to Cross Site Scripting (XSS) vulnerability

The Custom Field Template plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the $search_label parameter in versions up to, and including, 2.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.