CVE-2026-19433 PUBLISHED

Authorization Bypass Through User-Controlled Key in the contact management component in Roskus Prospero Flow CRM before 5.4.8 allows authenticated users of any company to blindly overwrite the contact data of another company and to download that contact's personal data as a vCard via the contact's numeric identifier, because the save and export operations retrieve the record without constraining the query to the authenticated user's company.

Upgrade to version 5.4.8 or higher.

• Darío Rivas Quero finder
• Alejandro Gutiérrez López finder
• Cristian Fernández Cornejo analyst
• Xoán M. Otero Jorge analyst
• Secur0 CNA coordinator
• Gustavo Novaro remediation developer

• https://github.com/Roskus/prospero-flow-crm/commit/f16b4af2027b17bef7c604c92dbd86cf38082398
• https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3
• https://secur0.com/en/cna/cve-list/cve-2026-19433-idor-in-prospero-flow-crm-contact-save-and-vcard-export

• CWE-639 Authorization bypass through User-Controlled key CWE

• CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs