Profession Fit 5.0.99 Build 44910 allows authorization bypass via a direct request for /api/challenges/{id} and also URLs for eversports, the user-management page, and the plane page.
Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:LI:NA:N5.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:NOther