TypeBot is a chatbot builder tool. In version 3.16.1, an authenticated user who has read access to any typebot can resume a WhatsApp preview webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign preview phone number tied to another preview session. The WhatsApp test-webhook handler authorizes the parent typebot first, but then resolves the preview chat session only by `wa-preview-{phone}`.
As a result, an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot. Version 3.17.0 patches the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/baptisteArno/typebot.io/commit/36a618610174fd168fb255d9c8ecc…
security-advisories@github.com
https://github.com/baptisteArno/typebot.io/pull/2499
security-advisories@github.com
https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0
security-advisories@github.com
https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fqf7-mmp5-j…
security-advisories@github.com