CDA.xsl in HL7 C-CDA 1.1 and earlier does not anticipate the possibility of invalid C-CDA documents with crafted XML attributes, which allows remote attackers to conduct XSS attacks via a document containing a table that is improperly handled during unrestricted xsl:copy operations.
gforge.hl7.org/gf/project/strucdoc/frs/?action=FrsReleaseView&release_id=1088
smartplatforms.org/2014/04/security-vulnerabilities-in-ccda-display/
www-01.ibm.com/support/docview.wss?uid=swg21699588
www.securityfocus.com/bid/69633
www.securitytracker.com/id/1033511
motorcycleguy.blogspot.com/2014/04/hl7-cda-stylesheet-patches.html