The WP Songbook WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the url parameter found in the ~/inc/class.ajax.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.0.11.Creditsp7e4Referenceshttps://www.wordfence.com/vulnerability-advisories/#CVE-2021-34655https://plugins.trac.wordpress.org/browser/wp-songbook/tags/2.0.11/inc/class.ajax.php#L21