Bugzilla before 3.2.10, 3.4.x before 3.4.10, 3.6.x before 3.6.4, and 4.0.x before 4.0rc2 does not properly handle whitespace preceding a (1) javascript: or (2) data: URI, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the URL (aka bug_file_loc) field.

Bugzilla before 3.2.10, 3.4.x before 3.4.10, 3.6.x before 3.6.4, and 4.0.x before 4.0rc2 creates a clickable link for a (1) javascript: or (2) data: URI in the URL (aka bug_file_loc) field, which allows remote attackers to conduct cross-site scripting (XSS) attacks against logged-out users via a crafted URI.

The Old Charts implementation in Bugzilla 2.12 through 3.2.8, 3.4.8, 3.6.2, 3.7.3, and 4.1 creates graph files with predictable names in graphs/, which allows remote attackers to obtain sensitive information via a modified URL.

CRLF injection vulnerability in Bugzilla before 3.2.9, 3.4.x before 3.4.9, 3.6.x before 3.6.3, and 4.0.x before 4.0rc1, when Server Push is enabled in a web browser, allows remote attackers to inject arbitrary HTTP headers and content, and conduct HTTP response splitting attacks, via a crafted URL.