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Server-Side Request Forgery (SSRF)
Description
Server-Side Request Forgery (SSRF) is a web security vulnerability that allows an attacker to induce the server-side application to make HTTP requests to an arbitrary domain of the attacker's choosing. This can lead to unauthorized access to internal systems, cloud metadata endpoints, or other sensitive resources.
Common Attack Vectors
- URL parameters
- File upload (via URL)
- Webhook endpoints
- PDF generators
- Image processing services
- API integrations
Testing Approach
Submit URLs pointing to internal resources, cloud metadata endpoints, or localhost to test if the application makes requests to those resources.
Payloads
See ssrf-payloads.txt for a comprehensive list of SSRF payloads.