TypeBot is a chatbot builder tool. Versions prior to 3.17.0 expose a deprecated public upload endpoint at `GET /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url` that accepts an attacker-controlled `filePath` and returns a presigned S3 `PUT` URL for that exact key. Because the endpoint only checks that the referenced typebot is public and that the referenced block is a file input block, an unauthenticated attacker who knows a valid public `typebotId` and `blockId` can request presigned upload URLs for arbitrary objects in the shared bucket, including `private/...` and other tenants' `public/...` paths.
Version 3.17.0 fixes this issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/baptisteArno/typebot.io/commit/7ae4c007d0987d2ca907b47e1b741…
security-advisories@github.com
https://github.com/baptisteArno/typebot.io/pull/2459
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-m7f5-3wcm-x…
security-advisories@github.com