[-] Title : Nextpost 4.1 - Cross-Site Scripting [-] Author : Ashkan Moghaddas [-] Vendor : https://getnextpost.io [-] Category : Webapps [-] Date : 07.2.2018 [-] Google Dork: N/A Vulnerable page : app/lib/OneFileManager/Common.php Vulnerable Source : Line52: echo echo json_encode($output) : $_GET['callback'] . "(" . json_encode($output) . ")"; POC : http://localhost/app/lib/OneFileManager/Common.php?callback=[XSS] ================================ WebSite : UltraSec.Org Channel : @UltraSecurity Email : ashkanmoghaddas77@gmail.com Special Thanks : abolfazl hajizade , MrQadir , Milad Ranjbar