The WP Lightbox 2 WordPress plugin before 3.0.7 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).
https://wpscan.com/vulnerability/e0536061-140d-47eb-9e8b-9785b52c62f7/