The host is installed with Atlassian Jira Server before 7.13.17, 7.14.0 before 8.5.8 or 8.6.0 before 8.12.0 and is prone to an information disclosure vulnerability. A flaw is present in the application which fails to properly handle an issue in the /browse.PROJECTKEY endpoint. Successful exploitation could allow remote attackers to enumerate project keys.