CVE-2017-18101
Various administrative external system import resources in Atlassian JIRA Server (including JIRA Core) before version 7.6.5, from version 7.7.0 before version 7.7.3, from version 7.8.0 before version 7.8.3 and before version 7.9.0 allow remote attackers to run import operations and to determine if an internal service exists through missing permission checks.
Source: CVE-2017-18101