CVE-2026-59234: CWE-639 Authorization Bypass Through User-Controlled Key in Roskus Prospero Flow CRM
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($id)->delete() and performs no ownership check (no user_id/company_id scoping) before deletion. This results in unauthorized destruction of other users' calendar events across the platform.
AI Analysis
Technical Summary
This vulnerability (CWE-639) exists in the CalendarDeleteEventController of Prospero Flow CRM prior to version 5.5.3. The controller's delete endpoint (GET /calendar/event/delete/{id}) uses Calendar::find($id)->delete() without checking if the event belongs to the authenticated user or their company. This lack of authorization checks permits an attacker with valid authentication to delete arbitrary calendar events by supplying different event IDs, resulting in unauthorized data destruction.
Potential Impact
An authenticated attacker can delete calendar events of other users without authorization, leading to potential data loss and disruption of calendar functionality for affected users. This compromises data integrity and availability within the CRM platform.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to the affected endpoint and review user permissions to limit exposure.
CVE-2026-59234: CWE-639 Authorization Bypass Through User-Controlled Key in Roskus Prospero Flow CRM
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($id)->delete() and performs no ownership check (no user_id/company_id scoping) before deletion. This results in unauthorized destruction of other users' calendar events across the platform.
CVSS v4.0
Score 6.9medium
Affected software
pkg:github/Prospero Flow CRMcpe:2.3:a:roskus:prospero_flow_crm:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-639) exists in the CalendarDeleteEventController of Prospero Flow CRM prior to version 5.5.3. The controller's delete endpoint (GET /calendar/event/delete/{id}) uses Calendar::find($id)->delete() without checking if the event belongs to the authenticated user or their company. This lack of authorization checks permits an attacker with valid authentication to delete arbitrary calendar events by supplying different event IDs, resulting in unauthorized data destruction.
Potential Impact
An authenticated attacker can delete calendar events of other users without authorization, leading to potential data loss and disruption of calendar functionality for affected users. This compromises data integrity and availability within the CRM platform.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to the affected endpoint and review user permissions to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Secur0
- Date Reserved
- 2026-07-03T11:24:39.241Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a47b76327e9c79719be3e78
Added to database: 07/03/2026, 13:21:39 UTC
Last enriched: 07/11/2026, 09:00:30 UTC
Last updated: 08/17/2026, 12:41:18 UTC
Views: 111
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