KingComposer, a WordPress plugin found installed with over 100,000 WordPress sites found vulnerable to Reflected Cross-Site Scripting . The vulnerability was found by the Wordfence security team with KingComposer Drag and Drop page building plugin. The vulnerability can be exploited by the attacker tricking the victim into clicking a malicious link, which sends the victim to the vulnerable website along with the payload. It can be tracked as CVE-2020-15299 and received CVSS Score: 6.1. the version before 2.9.5 is affected by the vulnerability. The vulnerability resides with AJAX action that no longer actively used by the plugin, “but could still be used by sending a POST request to wp-admin/admin-ajax.php with the action parameter set to kc_install_online_preset .” The vulnerability can be exploited using base64-encoding on a malicious payload and trick the victim into sending a request through a kc-online-preset-data parameter, which woul...