WhaTicket Community through commit cf04795 IDOR via /tickets/:ticketId and /messages/:ticketId

Advisories

WhaTicket Community through commit cf04795 IDOR via /tickets/:ticketId and /messages/:ticketId

Severity: medium
Date: 10/16/2026
Affecting: whaticket-community <= cf047955a6f0d07002ed89c67d765c28d06f8d52
CVE: CVE-2026-111709
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 5.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References: https://hackmd.io/@hieuPenguinnn/whaticket-community-signup-eop-ticket-idor
https://github.com/canove/whaticket-community/blob/cf047955a6f0d07002ed89c67d765c28d06f8d52/backend/src/services/TicketServices/ShowTicketService.ts
https://github.com/canove/whaticket-community/blob/cf047955a6f0d07002ed89c67d765c28d06f8d52/backend/src/controllers/MessageController.ts#L24-L58
https://github.com/canove/whaticket-community
Credit: hieuPenguinnn
Description: WhaTicket Community through commit cf04795 contains an insecure direct object reference vulnerability that allows authenticated agents to access other agents' tickets because ShowTicketService performs no ownership or queue checks. Attackers can supply another agent's ticket id to GET /tickets/:ticketId and /messages/:ticketId to read full message history and POST WhatsApp replies.

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