CVE-2026-77780 PUBLISHED

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

Assigner: Secur0
Reserved: 21.08.2026 Published: 21.08.2026 Updated: 21.08.2026

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.

Metrics

CVSS 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
CVSS Score: 5.3

Product Status

Vendor Roskus
Product Prospero Flow CRM
Versions Default: unaffected
  • affected from 4.9.1 to 5.14.2 (excl.)

Solutions

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.

Credits

  • Adrián García López finder
  • Xoán M. Otero Jorge analyst
  • Darío Rivas Quero analyst
  • Secur0 CNA coordinator
  • Gustavo Novaro remediation developer

References

Problem Types

  • CWE-639: Authorization Bypass Through User-Controlled Key CWE

Impacts

  • CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs