> 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/essential-skills/fast-detection-with-targeted-scanning.md).
# Fast Detection with Targeted Scanning
Fast Detection with Targeted Scanning notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.
### Discovering Vulnerabilities Quickly with Targeted Scanning
#### Lab Context
This lab contains a vulnerability to **read arbitrary files on the server**. / The goal is to **recover the contents of the `/etc/passwd` file in less than 10 minutes**.
Due to this time constraint, it is recommended to use **Burp Scanner** rather than a full application audit.
#### Contrainte Temporelle
* A \*\* 10-minute meter\*\* is active from the start of the lab.
* An overall site scan may be too slow.
* It is therefore preferable to **smartly target potentially vulnerable entry points**.
#### Methodology
1. **Intercept a relevant HTTP request** with Burp Proxy.
Quickly analyze the logic of the query to identify an interesting endpoint.
Run a targeted scan via **Burp Scanner** on this specific query.
#### Burp Scan Configuration
* Type of scan selected: **Crawl and Audit**
* Mode : **Scan rapide**
Objective: quickly identify a exploitable attack vector
#### Vulnerability Identified
The scan reveals a vulnerability of type **XML Injection (XInclude)**.
Initial Payload detected by Burp Scanner:
{% code overflow="wrap" %}
```xml
```
{% endcode %}
This confirms that the server processes **XInclude** entities without restriction.
#### Exploitation: Reading `/etc/passwd`
The payload is modified to include a local system file:
{% code overflow="wrap" %}
```http
productId=
id>&storeId=1
```
{% endcode %}
---
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