Is it safe to leave the action attribute empty in an HTML form?

Leaving the action attribute empty in an HTML form can lead to unexpected behavior, as the form will default to submitting to the current page URL. This can cause issues with form processing and may result in sensitive data being exposed in the URL. To solve this issue, it's recommended to explicitly specify the URL of the form processing script in the action attribute. 

<form action="process_form.php" method="post">
  <!-- form fields go here -->
</form>

Keywords

PHP HTML form action attribute security vulnerability

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