What’s Vulnerable › Vulnerabilities

CVE-2026-19433: Authorization Bypass Through User-Controlled Key in Prospero Flow CRM contact save and vCard export

• Severity: high (CVSS 8.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-10-23
• Weakness: CWE-639

Description

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.

Affected products

• Roskus Prospero Flow CRM: before 5.4.8 — fixed in 5.4.8

How to fix

Upgrade to a fixed version: Roskus Prospero Flow CRM 5.4.8. Check the vendor advisory for mitigations.

References

• 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

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