CVE-2019-16907
An issue was discovered in the Infosysta "In-App & Desktop Notifications" app 1.6.13_J8 for Jira. It is possible to obtain a list of all valid Jira usernames without authentication/authorization via the plugins/servlet/nfj/UserFilter?searchQuery=@ URI.
Date published : 2019-10-31
https://seclists.org/bugtraq/2019/Nov/0
http://packetstormsecurity.com/files/154993/Infosysta-Jira-1.6.13_J8-User-Name-Disclosure.html