The Gliffy plugin before 3.7.1 for Atlassian JIRA, and before 4.2 for Atlassian Confluence, does not properly restrict the capabilities of third-party XML parsers, which allows remote attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/75697
http://secunia.com/advisories/49166
http://confluence.atlassian.com/display/JIRA/JIRA+Security+Advisory+2012-05-17
http://confluence.atlassian.com/display/DOC/Confluence+Security+Advisory+2012-05-17