GHSA-77X8-3V3H-HRHV MantisBT: Reflected XSS in admin/install.php

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 printtestresult. No authentication is required. A Content Security Policy script-src 'self' prevents inline JavaScript execution, but t...