post_bug.cgi in Bugzilla 2.10 through 2.18, 2.19.1, and 2.19.2 allows remote authenticated users to "enter bugs into products that are closed for bug entry" by modifying the URL to specify the name of the product.

Bugzilla 2.17.1 through 2.18, 2.19.1, and 2.19.2, when a user is prompted to log in while attempting to view a chart, displays the password in the URL, which may allow local users to gain sensitive information from web logs or browser history.

Cross-site scripting (XSS) vulnerability in Bugzilla before 2.18, including 2.16.x before 2.16.11, allows remote attackers to inject arbitrary HTML and web script via forced error messages, as demonstrated using the action parameter.

process_bug.cgi in Bugzilla 2.9 through 2.18rc2 and 2.19 from CVS does not check edit permissions on the keywords field, which allows remote authenticated users to modify the keywords in a bug via the keywordaction parameter.

show_bug.cgi in Bugzilla 2.17.1 through 2.18rc2 and 2.19 from CVS, when using the insidergroup feature and exporting a bug to XML, shows comments and attachment summaries which are marked as private, which allows remote attackers to gain sensitive information.

Bugzilla 2.17.1 through 2.18rc2 and 2.19 from cvs, when using the insidergroup feature, does not sufficiently protect private attachments when there are changes to the metadata, such as filename, description, MIME type, or review flags, which allows remote authenticated users to obtain sensitive information when (1) viewing the bug activity log or (2) receiving bug change notification mails.

DBI in Bugzilla 2.17.1 through 2.17.7 displays the database password in an error message when the SQL server is not running, which could allow remote attackers to gain sensitive information.

Unknown vulnerability in the administrative controls in Bugzilla 2.17.1 through 2.17.7 allows users with "grant membership" privileges to grant memberships to groups that the user does not control.

Unknown vulnerability in (1) duplicates.cgi and (2) buglist.cgi in Bugzilla 2.16.x before 2.16.6, 2.18 before 2.18rc1, when configured to hide products, allows remote attackers to view hidden products.

Multiple cross-site scripting (XSS) vulnerabilities in (1) editcomponents.cgi, (2) editgroups.cgi, (3) editmilestones.cgi, (4) editproducts.cgi, (5) editusers.cgi, and (6) editversions.cgi in Bugzilla 2.16.x before 2.16.6, and 2.18 before 2.18rc1, allow remote attackers to execute arbitrary JavaScript as other users via a URL parameter.

Bugzilla 2.17.5 through 2.17.7 embeds the password in an image URL, which could allow local users to view the password in the web server log files.

SQL injection vulnerability in editusers.cgi in Bugzilla 2.16.x before 2.16.6, and 2.18 before 2.18rc1, allows remote attackers with privileges to grant membership to any group to execute arbitrary SQL.

Multiple cross-site scripting vulnerabilities (XSS) in Bugzilla 2.16.x before 2.16.3 and 2.17.x before 2.17.4 allow remote attackers to insert arbitrary HTML or web script via (1) multiple default German and Russian HTML templates or (2) ALT and NAME attributes in AREA tags as used by the GraphViz graph generation feature for local dependency graphs.

Bugzilla 2.16.x before 2.16.3, 2.17.x before 2.17.4, and earlier versions allows local users to overwrite arbitrary files via a symlink attack on temporary files that are created in directories with group-writable or world-writable permissions.

The data collection script for Bugzilla 2.14.x before 2.14.5, 2.16.x before 2.16.2, and 2.17.x before 2.17.3 sets world-writable permissions for the data/mining directory when it runs, which allows local users to modify or delete the data.

The default .htaccess scripts for Bugzilla 2.14.x before 2.14.5, 2.16.x before 2.16.2, and 2.17.x before 2.17.3 do not include filenames for backup copies of the localconfig file that are made from editors such as vi and Emacs, which could allow remote attackers to obtain a database password by directly accessing the backup file.

Cross-site scripting (XSS) vulnerability in the quips feature in Mozilla Bugzilla 2.10 through 2.17 allows remote attackers to inject arbitrary web script or HTML via the "show all quips" page.