MantisBT before 1.3.1 and 2.x before 2.0.0-beta.2 uses a weak Content Security Policy when using the Gravatar plugin, which allows remote attackers to conduct cross-site scripting (XSS) attacks via unspecified vectors.

The "Project Documentation" feature in MantisBT 1.2.19 and earlier, when the threshold to access files ($g_view_proj_doc_threshold) is set to ANYBODY, allows remote authenticated users to download attachments linked to arbitrary private projects via a file id number in the file_id parameter to file_download.php.

Cross-site scripting (XSS) vulnerability in MantisBT 1.2.13 and later before 1.2.20.

Cross-site scripting (XSS) vulnerability in manage_custom_field_edit_page.php in MantisBT 1.2.19 and earlier allows remote attackers to inject arbitrary web script or HTML via the return parameter.

Cross-site scripting (XSS) vulnerability in MantisBT Filter API in MantisBT versions before 1.2.19, and versions 2.0.0-beta1, 1.3.0-beta1 allows remote attackers to inject arbitrary web script or HTML via the 'view_type' parameter.

If, after successful installation of MantisBT through 2.5.2 on MySQL/MariaDB, the administrator does not remove the 'admin' directory (as recommended in the "Post-installation and upgrade tasks" section of the MantisBT Admin Guide), and the MySQL client has a local_infile setting enabled (in php.ini mysqli.allow_local_infile, or the MySQL client config file, depending on the PHP setup), an attacker may take advantage of MySQL's "connect file read" feature to remotely access files on the MantisBT server.

MantisBT before 1.3.11, 2.x before 2.3.3, and 2.4.x before 2.4.1 omits a backslash check in string_api.php and consequently has conflicting interpretations of an initial \/ substring as introducing either a local pathname or a remote hostname, which leads to (1) arbitrary Permalink Injection via CSRF attacks on a permalink_page.php?url= URI and (2) an open redirect via a login_page.php?return= URI.

SQL injection vulnerability in manage_user_page.php in MantisBT before 1.2.19 and 1.3.x before 1.3.0-beta.2 allows remote administrators with FILE privileges to execute arbitrary SQL commands via the MANTIS_MANAGE_USERS_COOKIE cookie.

MantisBT before 1.2.19 and 1.3.x before 1.3.0-beta.2 does not properly restrict access to /*/install.php, which allows remote attackers to obtain database credentials via the install parameter with the value 4.

Mantis Bug Tracker (aka MantisBT) 1.2.12 before 1.2.15 allows remote attackers to cause a denial of service (resource consumption) via a filter using a criteria, text search, and the "any condition" match type.

MantisBT before 1.2.18 does not properly check permissions when sending an email that indicates when a monitored issue is related to another issue, which allows remote authenticated users to obtain sensitive information about restricted issues.

bug_report.php in MantisBT before 1.2.18 allows remote attackers to assign arbitrary issues via the handler_id parameter.

Cross-site scripting (XSS) vulnerability in admin/copy_field.php in MantisBT before 1.2.18 allows remote attackers to inject arbitrary web script or HTML via the dest_id field.

Multiple cross-site scripting (XSS) vulnerabilities in core/summary_api.php in MantisBT 1.2.12 allow remote authenticated users with manager or administrator permissions to inject arbitrary web script or HTML via a (1) category name in the summary_print_by_category function or (2) project name in the summary_print_by_project function.

The current_user_get_bug_filter function in core/current_user_api.php in MantisBT before 1.2.18 allows remote attackers to execute arbitrary PHP code via the filter parameter.

The print_test_result function in admin/upgrade_unattended.php in MantisBT 1.1.0a3 through 1.2.x before 1.2.18 allows remote attackers to obtain database credentials via a URL in the hostname parameter and reading the parameters in the response sent to the URL.

Cross-site scripting (XSS) vulnerability in the filter_draw_selection_area2 function in core/filter_api.php in MantisBT 1.2.12 before 1.2.13 allows remote attackers to inject arbitrary web script or HTML via the match_type parameter to bugs/search.php.

Cross-site scripting (XSS) vulnerability in admin/install.php in MantisBT before 1.2.19 and 1.3.x before 1.3.0-beta.2 allows remote attackers to inject arbitrary web script or HTML via the (1) admin_username or (2) admin_password parameter.

The string_insert_href function in MantisBT 1.2.0a1 through 1.2.x before 1.2.18 does not properly validate the URL protocol, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the javascript:// protocol.

Cross-site scripting (XSS) vulnerability in file_download.php in MantisBT before 1.2.18 allows remote authenticated users to inject arbitrary web script or HTML via a Flash file with an image extension, related to inline attachments, as demonstrated by a .swf.jpeg filename.