Description
Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero
Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other
companies on the same instance via an incremented identifier in GET /api/transaction/{id},
which is resolved without company scoping and without any permission check.
Published: 2026-08-21
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to 5.3.6 or later. The fix was not tagged; the first tagged release carrying it is v5.5.3.

Tracking

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Advisories

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History

Fri, 21 Aug 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 21 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
Description Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other companies on the same instance via an incremented identifier in GET /api/transaction/{id}, which is resolved without company scoping and without any permission check.
Title IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
First Time appeared Roskus
Roskus prospero Flow Crm
Weaknesses CWE-639
CPEs cpe:2.3:a:roskus:prospero_flow_crm:*:*:*:*:*:*:*:*
Vendors & Products Roskus
Roskus prospero Flow Crm
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Roskus Prospero Flow Crm
cve-icon MITRE

Status: PUBLISHED

Assigner: Secur0

Published:

Updated: 2026-08-21T11:53:17.782Z

Reserved: 2026-08-21T10:08:00.647Z

Link: CVE-2026-77759

cve-icon Vulnrichment

Updated: 2026-08-21T11:53:08.078Z

cve-icon NVD

Status : Received

Published: 2026-08-21T12:16:36.533

Modified: 2026-08-21T12:16:36.533

Link: CVE-2026-77759

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T12:45:04Z

Weaknesses