CVE-2026-59234: Prospero Flow CRM 1.0.0 to before 5.5.3

Affected technology

Prospero Flow CRM · 1.0.0 to before 5.5.3
Roskus

Description’s affected range: Through User-Controlled Key (CWE-639) in CalendarDeleteEventController (app/Http/Controllers/Calendar/CalendarDeleteEventController.php)

Component: Not specified by the source
File: app/Http/Controllers/Calendar/CalendarDeleteEventController.php

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

A remote, authenticated attacker can 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. Source advisory’s CVSS 4.0 assessment (base score 6.9/10) rates confidentiality impact as none; integrity and availability impact as low.