The Click to Chat for WhatsApp plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 4.44 This is due to the greetingsdialog() function building the {url} template placeholder from a sanitizetextfield()-filtered $SERVER['REQUESTURI'] on archive pages and then passing the substituted greeting content to doshortcode() in the greetings-1 and greetings-2 templates, without stripping shortcode delimiters. Because wpkses() runs against maincontent BEFORE the {url} substitution, the attacker-controlled URL bytes reach doshortcode() unfiltered. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes registered by WordPress core, the active theme, or any other plugin (e.