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ssrf-oob

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Prove blind SSRF by injecting an out-of-band callback into URL params and forwarding headers, then watching for the hit. Use when testing for SSRF.

skills/applicative-pentest/ssrf-oob/SKILL.md

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Nov 7, 2026
License
MIT

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## Contents
- Scope & authorization
- Step 0 - stand up the collaborator / OAST listener
- Injection points (query params, headers, bulk sweep)
- Port -> scheme logic
- Methodology
- Runnable snippets
- Output

## Scope & authorization

Only run against hosts you own or are contractually engaged to test. This check is **active and aggressive**: it sends live HTTP requests that try to coerce the target into making outbound DNS/HTTP requests to infrastructure you control. Do not point it at third parties.

The whole method is out-of-band: the target's HTTP response usually will not tell you whether SSRF fired. The signal is the **interaction** (a DNS resolution and/or an HTTP hit) arriving at your callback host. So the OAST listener is the instrument - stand it up first and keep watching it throughout.