Microsoft FrontPage 2003 SP3 does not properly parse DTDs, which allows remote attackers to obtain sensitive information via crafted XML data in a FrontPage document, aka "XML Disclosure Vulnerability."
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-3075
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-078