The "View Bugs" page (view_all_bug_page.php) in Mantis 0.17.4a and earlier includes summaries of private bugs for users that do not have access to any projects.

Mantis 0.17.4a and earlier allows remote attackers to view private bugs by modifying the f_id bug ID parameter to (1) bug_update_advanced_page.php, (2) bug_update_page.php, (3) view_bug_advanced_page.php, or (4) view_bug_page.php.

config_inc2.php in Mantis before 0.17.4 allows remote attackers to execute arbitrary code or read arbitrary files via the parameters (1) g_bottom_include_page, (2) g_top_include_page, (3) g_css_include_file, (4) g_meta_include_file, or (5) a cookie.

print_all_bug_page.php in Mantis 0.17.3 and earlier does not verify the limit_reporters option, which allows remote attackers to view bug summaries for bugs that would otherwise be restricted.