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prevent CSRF if hit login twice #664

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Merged
artoonie merged 1 commit into from
Oct 19, 2026
Merged

prevent CSRF if hit login twice #664

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16 changes: 14 additions & 2 deletions templates/registration/login.html
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Original file line number Diff line number Diff line change
Expand Up @@ -17,14 +17,26 @@ <h2>

{% include "registration/reg-optional-text.html" %}

<form action="." method="post">
<form action="." method="post" id="login-form">
<table class="table">
{% csrf_token %}
{{ form.as_table }}
</table>
<input type="submit" value="Submit"> or <a href="{% url 'django_registration_register' %}">register</a>
<input type="submit" id="login-submit" value="Submit"> or <a href="{% url 'django_registration_register' %}">register</a>
</form>

<script>
// Prevent double-submits: a second POST after login rotates the CSRF
// token and fails CSRF verification.
document.getElementById('login-form').addEventListener('submit', function() {
document.getElementById('login-submit').disabled = true;
});
// Re-enable if the page is restored from the back/forward cache
window.addEventListener('pageshow', function() {
document.getElementById('login-submit').disabled = false;
});
</script>

<p class="mt-5"><a href="{% url 'password_reset' %}">Forgot password?</a></p>

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha256-4+XzXVhsDmqanXGHaHvgh1gMQKX40OUvDEBTu8JcmNs=" crossorigin="anonymous"></script>
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