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Yes, there is a relevant writeup about SSRF in webhooks.
Writeup:
→Title: Blind SSRF Vulnerability in Stripo App Export via Missing Endpoints Export Email Message to Zapier
→Vulnerability type: Blind SSRF (Server-Side Request Forgery)
→Technique used: Exploiting the webhookUrl parameter
→Short explanation of the attack: This writeup discusses a critical Blind SSRF vulnerability found in Stripo's export service. By providing malicious input in the webhookUrl parameter, an attacker can manipulate the server to make unauthorized HTTP requests to attacker-controlled systems.
For more details, you can read the full writeup here.
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