GHSA-VCRW-4XVV-JH49 MantisBT: Reflected XSS in admin/install.php via unescaped printf

MantisBT 2.28.3 and earlier contains six reflected XSS injection points in /admin/install.php. User-supplied parameters are echoed into HTML without escaping via an unescaped printf format string. No authentication is required. A Content Security Policy script-src 'self' prevents inline JavaScrip...