> 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/basic-ssrf-against-local-server.md).

# Basic SSRF Against the Local Server

Basic SSRF Against the Local Server notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.

### Basic SSRF Against the Local Server

This lab offers a stock verification feature that questions an internal service. / The objective is to modify the URL used by this check to access the administration interface available on `HTTP://localhost/admin` and then delete the user **carlos**.

#### **Analysis and Exploitation**

The **stockApi** parameter sends a query to an internal URL:

```bash
stockApi=http://stock.weliketoshop.net:8080/product/stock/check?productId=1&storeId=1
```

By intercepting the request, it is possible to replace this URL with a local target. / The server correctly processes the following value:

```javascript
stockApi=http://localhost/admin
```

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-5f1135ef7a777270cae920e4e524c9c78b0e4bda%2Fimage%20(337).png?alt=media" alt=""><figcaption></figcaption></figure>

This allows to display the administration interface.

#### **Deletion of the User**

In the HTML code of the admin interface, we observe the parameter used to delete a user:

```
/admin/delete?username=carlos
```

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-9f056e8db3df4ebc8a07a5cbb7852ca26f7d3ad8%2Fimage%20(338).png?alt=media" alt=""><figcaption></figcaption></figure>


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