XSS, CSRF, and SQL Injection Defenses
Use Django's protections correctly.
XSS, CSRF, and SQL Injection Defenses is a free Django Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Django Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
The Big Three Web Attacks
Most web breaches come from three classics: XSS, CSRF, and SQL injection. The good news is Django defends against all three when you use it normally. 🛡️
What XSS Is
XSS happens when attacker-supplied text is rendered as live HTML or script in another user's browser, letting it steal data or hijack the page.
Templates Auto-Escape
Django's template engine auto-escapes variables, turning dangerous characters into safe entities. A script in user input renders as harmless text, not code.
<p>{{ user_comment }}</p>Do Not Disable Escaping
The safe filter and mark_safe turn escaping off. Only use them on content you fully trust, or you reopen the XSS door yourself.
{{ user_comment|safe }}What CSRF Is
CSRF tricks a logged-in user's browser into submitting a hidden request to your site, performing actions they never intended, like changing a password.
The CSRF Token
Django blocks this with a secret CSRF token tied to each session. A forged form from another site cannot include the right token, so the POST is rejected.
Add the Token to Forms
Drop the csrf_token tag inside every POST form. Django injects the hidden field and verifies it on submit, all automatically.
<form method="post">{% csrf_token %}
...
</form>What SQL Injection Is
SQL injection sneaks malicious SQL into a query through user input, letting an attacker read, change, or delete data they should never touch.
The ORM Protects You
Using the ORM keeps you safe by default. It parameterizes values, so user input is treated as data, never as executable SQL.
Article.objects.filter(title=user_input)Parameterize Raw SQL
If you must write raw SQL, never glue input into the string. Pass values as parameters so the driver escapes them safely for you.
Article.objects.raw("SELECT * FROM blog_article WHERE id = %s", [pk])Add a Content Security Policy
For defense in depth against XSS, a Content Security Policy tells browsers which scripts may run. It limits damage even if bad markup slips through.
Quick Check
One question on how Django keeps these attacks out.
Recap: Defaults Are Your Friend
Template auto-escaping, the CSRF token, and the parameterized ORM shut down XSS, CSRF, and SQL injection. Stay on the defaults and you stay safe. 🙌
Frequently asked questions
Is the “XSS, CSRF, and SQL Injection Defenses” lesson free?
Yes — the full text of “XSS, CSRF, and SQL Injection Defenses” is free to read here on the web, and the Django Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Django Academy course, upgrade to CoddyKit PRO.
What will I learn in “XSS, CSRF, and SQL Injection Defenses”?
Use Django's protections correctly. You practise Django Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Django Academy?
No prior experience is required. Django Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “XSS, CSRF, and SQL Injection Defenses” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Django Academy lesson?
Yes. Every Django Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- DEBUG, SECRET_KEY, and ALLOWED_HOSTS
- HTTPS, HSTS, and Secure Cookies
- XSS, CSRF, and SQL Injection Defenses
- Running the Deployment Checklist