CVE-2026-59234 | Authorization Bypass Through User-Controlled Key (CWE-639) i… | CVSS 6.9 MEDIUM

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.

Metadata

CVE ID: CVE-2026-59234
State: PUBLISHED
Assigner: Secur0
Reserved: 2026-07-03 11:24 UTC
Published: 2026-07-03 12:47 UTC
Last updated: 2026-07-03 12:47 UTC
Primary CWE: CWE-639
CWE-639 Authorization Bypass Through User-Controlled Key
Vendor / Product: Roskus / Prospero Flow CRM
Sources: cve.org · NVD

Severity & Metrics

6.9 MEDIUM CVSS 4.0

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

Affected products (1)

Vendor	Product	Platform	Versions
Roskus	Prospero Flow CRM	—	1.0.0 < 5.5.3

Weakness (CWE)

CWE	Source	Description
CWE-639	cna	CWE-639 Authorization Bypass Through User-Controlled Key

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.9	MEDIUM	4.0	cna	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

References (3)

Fix commit 8c26eed4 - add user_id ownership check before delete https://github.com/Roskus/prospero-flow-crm/commit/8c26eed4d80544c30e55448e12a8e999af6d2b70
Release v5.5.3 (fixed version) https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3
https://secur0.com/en/cna/cve-list/cve-2026-59234-idor-in-prospero-flow-crm-allows-deletion-of-other-users-calendar-events