CVE-2026-77780

Unvalidated bank account and card foreign keys in the Prospero Flow CRM transaction save endpoint allow cross-tenant disclosure of banking identifiers

Published Aug 21, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
Authorization Bypass Through User-Controlled Key in the transaction save endpoint in Roskus
Prospero Flow CRM 4.9.1 through 5.14.0 allows a user with transaction and accounting
creation permissions to disclose another company's bank account name, bank name and card
last four digits via a bank_account_id or bank_card_id belonging to that company in POST
/transaction/save, which is persisted and rendered without any company ownership check.

Remediation

Vendor Solution

Upgrade to 5.14.2 or later. No tagged release carries the fix; the newest tag v5.14.0 is affected. Rows already written are not corrected by the patch.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Authorization Bypass Through User-Controlled Key in the transaction save endpoint in Roskus Prospero Flow CRM 4.9.1 through 5.14.0 allows a user with transaction and accounting creation permissions to disclose another company's bank account name, bank name and card last four digits via a bank_account_id or bank_card_id belonging to that company in POST /transaction/save, which is persisted and rendered without any company ownership check.
Title Unvalidated bank account and card foreign keys in the Prospero Flow CRM transaction save endpoint allow cross-tenant disclosure of banking identifiers
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': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Secur0
Published
Updated
Aug 21, 2026, 4:12 PM
Reserved
Aug 21, 2026, 11:30 AM
Status
Deferred
Published
Aug 21, 2026, 1:18 PM
Modified
Oct 15, 2026, 7:10 PM