Mantis before 1.1.0a2 sets the default value of $g_bug_reminder_threshold to "reporter" instead of a more privileged role, which has unknown impact and attack vectors, possibly related to frequency of reminders.
Multiple SQL injection vulnerabilities in Mantis 0.17.2 and earlier, when running without magic_quotes_gpc enabled, allows remote attackers to gain privileges or perform unauthorized database operations via modified form fields, e.g. to account_update.php.