Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.5.0 through 2.9.0 allows remote attackers to inject arbitrary web script or HTML via vectors related to uploader.swf, a similar issue to CVE-2010-4208.
http://yuilibrary.com/support/20121030-vulnerability/
http://www.yuiblog.com/blog/2012/11/05/post-mortem-swf-vulnerability-in-yui-2/
http://www.yuiblog.com/blog/2012/10/30/security-announcement-swf-vulnerability-in-yui-2/