Vulnerability · Published Jul 3, 2026 · Assigned by Secur0
CVE-2026-59234Authorization Bypass Through User-Controlled Key in Prospero Flow CRM calendar event deletion
Medium 6.9
In plain English
A medium-severity authorization bypass via user-controlled key in Prospero Flow CRM from Roskus. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).
Official description
Authorization Bypass Through User-Controlled Key (CWE-639) in CalendarDeleteEventController (app/Http/Controllers/Calendar/CalendarDeleteEventController.php), exposed at GET /calendar/event/delete/{id}, in Prospero Flow CRM before 5.5.3 allows a remote, authenticated attacker to delete arbitrary calendar events belonging to other users by manipulating the {id} path parameter, because the delete handler resolves the record with Calendar::find($id)->delete() and performs no ownership check (no user_id/company_id scoping) before deletion. This results in unauthorized destruction of other users' calendar events across the platform.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Roskus | Prospero Flow CRM | 1.0.0 – before 5.5.3 |
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N