The mci_account_get_array_by_id function in api/soap/mc_account_api.php in MantisBT before 1.2.18 allows remote attackers to obtain sensitive information via a (1) mc_project_get_users, (2) mc_issue_get, (3) mc_filter_get_issues, or (4) mc_project_get_issues SOAP request.
https://www.mantisbt.org/bugs/view.php?id=17243
https://www.mantisbt.org/bugs/changelog_page.php?version_id=191
https://github.com/mantisbt/mantisbt/commit/f779e3d4394a0638d822849863c4098421d911c5
https://exchange.xforce.ibmcloud.com/vulnerabilities/99257
https://bugzilla.redhat.com/show_bug.cgi?id=1171783
http://www.debian.org/security/2015/dsa-3120