Roskus Prospero Flow CRM up to 5.5.2 Calendar Event CalendarDeleteEventController.php delete ID authorization

Summaryinfo

A vulnerability was found in Roskus Prospero Flow CRM up to 5.5.2. It has been rated as problematic. This affects the function delete of the file app/Http/Controllers/Calendar/CalendarDeleteEventController.php of the component Calendar Event Handler. The manipulation of the argument ID leads to authorization. This vulnerability is listed as CVE-2026-59234. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Roskus Prospero Flow CRM up to 5.5.2. This issue affects the function delete of the file app/Http/Controllers/Calendar/CalendarDeleteEventController.php of the component Calendar Event Handler. The manipulation of the argument id with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Robert Mihaila, Amirreza Fadaeizadeh Bidari and Xoan M. Otero Jorge as 8c26eed4d80544c30e55448e12a8e999af6d2b70. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-59234 since 07/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:app/Http/Controllers/Calendar/CalendarDeleteEventController.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.5.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 8c26eed4d80544c30e55448e12a8e999af6d2b70 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Customer Relationship Management System

Vendor

• Roskus

Name

• Prospero Flow CRM

Version

• 5.5.0
• 5.5.1
• 5.5.2

License

• open-source

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CPE 2.2info

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