WordPress Photonic Gallery & Lightbox for Flickr, SmugMug & Others plugin <= 3.21 - Authenticated (Contributor+) Stored Cross-Site Scripting via Caption Attribute vulnerability

Authenticated Contributor+ Stored Cross-Site Scripting via Caption Attribute vulnerability discovered by Webbernaut in WordPress Plugin Photonic Gallery & Lightbox for Flickr, SmugMug & Others versions = 3.21...