Weakness
TDuck survey form through version 5.3 fails to validate webhook URLs or verify form ownership in the WebhookConfigController. Authenticated attackers can attach webhooks to other users' forms and exfiltrate submissions to arbitrary external or internal addresses.
References
- https://github.com/TDuckCloud/tduck-survey-form
- https://github.com/TDuckCloud/tduck-survey-form/blob/9ad4e2dc75cdff5eacc8be0c73f0d4db3c265d43/tduck-webhook/src/main/java/com/tduck/cloud/webhook/controller/WebhookConfigController.java#L43-L47
- https://github.com/TDuckCloud/tduck-survey-form/blob/9ad4e2dc75cdff5eacc8be0c73f0d4db3c265d43/tduck-webhook/src/main/java/com/tduck/cloud/webhook/service/sender/WebhookSenderService.java#L84-L100
- https://github.com/TDuckCloud/tduck-survey-form/issues/40
- https://www.vulncheck.com/advisories/tduck-survey-form-through-5.3-server-side-request-forgery-via-unvalidated-webhook-url
- https://github.com/TDuckCloud/tduck-survey-form/issues/40
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