A is a way for an application to provide other applications with real-time information. When you see a "Webhook URL" field in a web application, the app is essentially saying, "Give me a URL, and I will send data to it."
: If the application displays the "response" of the webhook (common in debugging tools), the attacker now has a functional access token. A is a way for an application to
To the untrained eye, it looks like a standard API endpoint. To a security professional, it represents a potential vulnerability that could lead to a full cloud environment takeover. What is 169.254.169.254? To a security professional, it represents a potential
If an attacker enters http://169.254.169 into a poorly secured webhook field, they are attempting an . They are trying to trick the cloud server into making a request to its own internal metadata service. The Attack Scenario: They are trying to trick the cloud server
: The attacker submits the IMDS URL as a webhook.
: Specifies that the request is looking for identity-related info.