> 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/access-control/user-id-controlled-by-parameter.md).
# User Id Controlled by Parameter
User Id Controlled by Parameter notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.
### User ID Controlled by Request Parameter
This lab presents a **horizontal privilege escalation** issue on the user account page. / To resolve the lab, you need to recover the **user API key carlos** and submit it as a solution. / You can connect with the following credentials: **wiener:peter**.
In our own user panel (that of wiener ), we observe that the account ID is transmitted in a URL parameter.
By changing this parameter and replacing our ID with carlos, for example:
```bash
/my-account?id=carlos
```
The page then displays carlos account information, allowing us to recover its \*\* API key\*\*.
---
# 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/access-control/user-id-controlled-by-parameter.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)