Bugzilla 2.16.x before 2.16.1 does not properly filter apostrophes from an email address during account creation, which allows remote attackers to execute arbitrary SQL via a SQL injection attack.

editproducts.cgi in Bugzilla 2.14.x before 2.14.4, and 2.16.x before 2.16.1, when the "usebuggroups" feature is enabled and more than 47 groups are specified, does not properly calculate bit values for large numbers, which grants extra permissions to users via known features of Perl math that set multiple bits.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, does not properly handle URL-encoded field names that are generated by some browsers, which could cause certain fields to appear to be unset, which has the effect of removing group permissions on bugs when buglist.cgi is provided with the encoded field names.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, when configured to perform reverse DNS lookups, allows remote attackers to bypass IP restrictions by connecting from a system with a spoofed reverse DNS hostname.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, directs error messages from the syncshadowdb command to the HTML output, which could leak sensitive information, including plaintext passwords, if syncshadowdb fails.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, may allow remote attackers to cause a denial of service or execute certain queries via a SQL injection attack on the sort order parameter to buglist.cgi.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, when performing a mass change, sets the groupset of all bugs to the groupset of the first bug, which could inadvertently cause insecure groupset permissions to be assigned to some bugs.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, (1) creates new directories with world-writable permissions, and (2) creates the params file with world-writable permissions, which allows local users to modify the files and execute code.

Cross-site scripting vulnerabilities in Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, could allow remote attackers to execute script as other Bugzilla users via the full name (real name) field, which is not properly quoted by editusers.cgi.

Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, allows authenticated users with editing privileges to delete other users by directly calling the editusers.cgi script with the "del" option.