The web interface in CUPS before 1.4.2, as used on Apple Mac OS X before 10.6.2 and other platforms, does not properly handle (1) HTTP headers and (2) HTML templates, which allows remote attackers to conduct cross-site scripting (XSS) attacks and HTTP response splitting attacks via vectors related to (a) the product's web interface, (b) the configuration of the print system, and (c) the titles of printed jobs, as demonstrated by an XSS attack that uses the kerberos parameter to the admin program, and leverages attribute injection and HTTP Parameter Pollution (HPP) issues.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9153
https://bugzilla.redhat.com/show_bug.cgi?id=529833
http://www.vupen.com/english/advisories/2009/3184
http://www.securityfocus.com/bid/36956
http://www.redhat.com/support/errata/RHSA-2009-1595.html
http://www.mandriva.com/security/advisories?name=MDVSA-2010:073
http://www.mandriva.com/security/advisories?name=MDVSA-2010:072
http://www.cups.org/str.php?L3367
http://www.cups.org/documentation.php/relnotes.html
http://www.cups.org/articles.php?L590
http://support.apple.com/kb/HT3937
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021115.1-1
http://secunia.com/advisories/37360
http://secunia.com/advisories/37308
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html