The WP Photo Album Plus WordPress plugin before 9.2.11.002 does not properly escape a category navigation value before reflecting it into a JavaScript event handler on its gallery breadcrumb links, allowing unauthenticated attackers to inject arbitrary script that executes in the browser of anyone who follows a crafted gallery link and clicks the breadcrumb, including a logged-in administrator.
https://wpscan.com/vulnerability/8328dd66-924c-4e74-972e-68ce65408159/