Multiple cross-site scripting (XSS) vulnerabilities in config_defaults_inc.php in MantisBT before 1.2.8 allow remote attackers to inject arbitrary web script or HTML via the PATH_INFO, as demonstrated by the PATH_INFO to (1) manage_config_email_page.php, (2) manage_config_workflow_page.php, or (3) bugs/plugin.php.
https://github.com/mantisbt/mantisbt/commit/d00745f5e267eba4ca34286d125de685bc3a8034
https://exchange.xforce.ibmcloud.com/vulnerabilities/69587
http://www.securityfocus.com/bid/49448
http://www.securityfocus.com/archive/1/519547/100/0/threaded
http://securityreason.com/securityalert/8392