WordPress Mailster <=1.5.4 - Cross-Site Scripting

WordPress Mailster 1.5.4 and before contains a cross-site scripting vulnerability in the unsubscribe handler via the mes parameter to view/subscription/unsubscribe2.php. id: CVE-2017-17451 info: name: WordPress Mailster =1.5.5 which includes a fix for this vulnerability. reference: -...