Fedora has issued an update for bugzilla. This fixes multiple vulnerabilities, which can be exploited by malicious users to conduct script insertion attacks and by malicious people to conduct HTTP response splitting attacks, cross-site request forgery attacks, and bypass certain security restrictions.

For more information:
SA43033

Solution
Apply updated packages via the yum utility ("yum update bugzilla").
Original Advisory
FEDORA-2011-0741:
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053665.html

FEDORA-2011-0755:
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053678.html

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers