Zabbix API user.get returns all users that share common group with the calling user. This includes media and other information, such as login attempts, etc.
Exploitability
AV:AAC:LAT:PPR:LUI:NVulnerable System
VC:LVI:NVA:NSubsequent System
SC:NSI:NSA:N2.1/CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NOther