Multiple cross-site scripting (XSS) vulnerabilities in filter_api.php in MantisBT before 1.2.7 allow remote attackers to inject arbitrary web script or HTML via a parameter, as demonstrated by the project_id parameter to search.php.
https://github.com/mantisbt/mantisbt/commit/317f3db3a3c68775de3acf3b15f55b1e3c18f93b
http://securityreason.com/securityalert/8391