A user with API access and "manage users" permission in any venueless world is able to trigger deletion of user accounts in other worlds.
Exploitability
AV:NAC:LAT:PPR:LUI:NVulnerable System
VC:NVI:HVA:LSubsequent System
SC:HSI:HSA:H7.3/CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:H/SI:H/SA:HOther