CVE-2026-59234

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.

PUBLISHED Reserved 2026-07-03 | Published 2026-07-03 | Updated 2026-07-06 | Assigner Secur0

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Credits

Robert Mihaila finder

Amirreza Fadaeizadeh Bidari finder

Xoan M. Otero Jorge analyst

Secur0 CNA coordinator

Gustavo Novaro remediation developer

References

github.com/...ommit/8c26eed4d80544c30e55448e12a8e999af6d2b70 (Fix commit 8c26eed4 - add user_id ownership check before delete) patch

github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3 (Release v5.5.3 (fixed version)) release-notes

secur0.com/...allows-deletion-of-other-users-calendar-events related

cve.org (CVE-2026-59234)

nvd.nist.gov (CVE-2026-59234)

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