Cross-site scripting (XSS) vulnerability in Mantis bugtracker allows remote attackers to inject arbitrary web script or HTML via (1) the return parameter to login_page.php, (2) e-mail field in signup.php, (3) action parameter to login_select_proj_page.php, or (4) hide_status parameter to view_all_set.php.

Mantis before 20041016 provides a complete Issue History (Bug History) in the web interface regardless of view_history_threshold, which allows remote attackers to obtain sensitive information (private bug details) by visiting a bug's web page.

signup_page.php in Mantis bugtracker allows remote attackers to send e-mail bombs by creating multiple users and providing the same e-mail address.

Mantis 0.17.5 and earlier stores its database password in cleartext in a world-readable configuration file, which allows local users to perform unauthorized database operations.