Atlassian Confluence before 5.8.17 contains an information disclsoure vulnerability. A remote authenticated user can read configuration files via the decoratorName parameter to (1) spaces/viewdefaultdecorator.action or (2) admin/viewdefaultdecorator.action.
View the template here CVE-2015-8399.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2015-8399