> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/web/ssrf/blind-ssrf-with-out-of-band-detection.md).
# Blind SSRF with Out-of-Band Detection
Blind SSRF with Out-of-Band Detection notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.
### Blind SSRF with Out-of-band Detection
This lab uses an analysis module that performs an HTTP request to the URL in the **Referer** header when a product page is loaded. / To solve the lab, you must use this behavior to trigger a request to the public server **Burp Collaborator**.
We find that the page recovers the value of the header Referer. / The aim is therefore to redirect this request to our Collaborator body.
Just send a query containing a malicious Refererer, for example:
```
Referer: https://ld2xyh6ornbpdovp5ww0sartzk5bt1hq.oastify.com
```
The server then performs an outgoing query, which appears in Burp Collaborator, confirming blind SSRF operation.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://hacking-notes.jord4n.pro/web/ssrf/blind-ssrf-with-out-of-band-detection.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
.png?alt=media)
.png?alt=media)