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# lab-4

## Server-Side Template Injection with Information Disclosure via User-Supplied Objects

**Difficulty:** Practitioner

### Lab Description

This lab is vulnerable to server-side template injection due to the way an object is passed into the template, which can be exploited to access sensitive data.

**Objective:** Steal and submit the framework's secret key.

**Credentials:** `content-manager:C0nt3ntM4n4g3r`

### Solution

**Step 1 — Locate the editable template**

Log in with the provided credentials, go to a product page, and edit its template.

**Step 2 — Confirm the template engine**

Change the existing `{{productstock}}` placeholder to:

```django
{{ 7*7 }}
```

The response shows `49`, and the error/behavior patterns confirm the backend is using the **Django** template engine.

**Step 3 — Use a debug built-in to enumerate context objects**

Django templates expose a built-in debug tag that discloses every object available in the rendering context:

```django
{% debug %}
```

Reviewing the disclosed objects reveals a `settings` object is accessible, which can be used to read the framework's secret key:

```django
{{ settings.SECRET_KEY }}
```

### Conclusion

Passing a raw settings/config object into the template context — rather than only the specific values needed — gave an attacker indirect read access to sensitive application secrets through Django's own debugging built-ins.


---

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