CVE-2026-19870: IDOR in Prospero Flow CRM allows cross-tenant payroll disclosure and creation

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Secur0). Independent of NVD's CPE analysis and usually ahead of it.

• Roskus Prospero Flow CRM

  • before 5.15.10affected · semver

Other highest-scoring records for the same primary product.

• CVE-2026-78365IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification
  37Monitor
• CVE-2026-19871Use of hard-coded credentials in Prospero Flow CRM employee onboarding
  37Monitor
• CVE-2026-114519Missing authorization in the Prospero Flow CRM user API allows a basic role user to read and delete other accounts
  34Monitor

Published before and after this one in the same product

• ← EarlierCVE-2026-19539Aug 11, 2026 · IDOR in Prospero Flow CRM allows cross-tenant ticket read, hijacking, and deletion
  34Monitor
• ← EarlierCVE-2026-19734Aug 13, 2026 · IDOR in Prospero Flow CRM allows cross-tenant product disclosure and hijacking
  34Monitor
• Later →CVE-2026-77759Aug 21, 2026 · IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
  34Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const invoice = await Invoice.findById(req.params.id);2res.json(invoice);

1const invoice = await Invoice.findOne({2  id: req.params.id,3  ownerId: req.user.id,4});5if (!invoice) return res.sendStatus(404);6res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.