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9.4

Prospero Flow CRM lets any logged‑in user upgrade their rights

CVE-2026-59233 · published 2 months ago
Summary

In Prospero Flow CRM versions before 5.2.1, a user who is signed in can send a specially crafted request to the permission‑saving page and give themselves full access to the system. This means they could perform actions normally reserved for administrators. Upgrade to version 5.2.1 or later, or apply the vendor's patch, to add the missing check and stop unauthorized role changes.

What to do
  • Update roskus prospero flow crm to version 5.2.1 or later.
Affected software
VendorProductAffected versions
roskus prospero flow crm < 5.2.1
Original advisory text
Missing Authorization in Prospero Flow CRM permission save endpoint allows privilege escalation
Missing Authorization in the permission management component in Roskus Prospero Flow CRM before 5.2.1 allows any authenticated user to grant any role, including their own, the complete set of application permissions via a crafted POST request to the permission save endpoint, which performs no authorization check before synchronizing the submitted permissions to the specified role.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.4 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-639Authorization Bypass Through User-Controlled Key
Timeline
Published10 Aug 2026
Updated4 Nov 2026
First seen10 Aug 2026
Sources
CVE-2026-59233 · NVD
CVE-2026-59233 · MITRE
CVE-2026-59233 · OSV
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