CVE-2026-19539

IDOR in Prospero Flow CRM allows cross-tenant ticket read, hijacking, and deletion

HIGH
8.6
CVSS Score
Published: August 11, 2026 at 01:54 PM UTC
Updated: October 23, 2026 at 07:10 PM UTC
1 product affected across 1 vendorProspero Flow CRM

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Authorization Bypass Through User-Controlled Key in the ticket management component in Roskus Prospero Flow CRM before 5.4.9 allows authenticated users of any company to read the full content (title, description, and attachments) of tickets belonging to another company, to hijack another company's tickets by reassigning their company_id, and to delete another company's tickets without any authorization check, via the ticket's numeric identifier, because the read and save operations retrieve the record without constraining the query to the authenticated user's company, and the delete controller type-hints a generic Illuminate\Http\Request instead of the TicketDeleteRequest that would enforce the required permission.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v < 5.4.90
Affected range stops below 5.4.9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHSecur0
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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