Interpretation conflict in file.inc in Drupal 4.5.0 through 4.5.5 and 4.6.0 through 4.6.3 allows remote authenticated users to inject arbitrary web script or HTML via HTML in a file with a GIF or JPEG file extension, which causes the HTML to be executed by a victim who views the file in Internet Explorer as a result of CVE-2005-3312. NOTE: it could be argued that this vulnerability is due to a design flaw in Internet Explorer and the proper fix should be in that browser; if so, then this should not be treated as a vulnerability in Drupal.
http://www.vupen.com/english/advisories/2005/2684
http://www.securityfocus.com/bid/15663
http://www.securityfocus.com/archive/1/418291/100/0/threaded
http://www.debian.org/security/2006/dsa-958
http://securityreason.com/securityalert/220
http://secunia.com/advisories/18630
http://secunia.com/advisories/17824