A cross-site scripting (XSS) vulnerability in the View Filters page (view_filters_page.php) in MantisBT 2.1.0 through 2.15.0 allows remote attackers to inject arbitrary code (if CSP settings permit it) through a crafted PATH_INFO.
https://mantisbt.org/bugs/view.php?id=24580
https://mantisbt.org/blog/archives/mantisbt/602
http://github.com/mantisbt/mantisbt/commit/4efac90ed89a5c009108b641e2e95683791a165a