Are JavaScript cookies secure for storing plain text data?

Within my datepicker navigation, I have implemented a system where the clicked date is converted to a string format (2015-08-31) and then stored in a cookie through the following code:

$datepicker_field.on('change', function (e) {
    if ($(this).val()) {
      //Converting mm/dd/yyyy to a readable date
      var splitDate = $(this).val().split('/');
      var readableDate = splitDate[2] + '-' + splitDate[0] + '-' + splitDate[1];
      document.cookie = "agendadate=" + readableDate;
    }
  });

This approach allows me to set the datepicker to the saved date upon page refresh, improving user experience.

My concern now is: Does this method pose any risks for XSS or Session Hijacking?

Answer №1

There is no issue at all. The data comes from the client and is stored on their side (in a cookie). If the client decides to modify it, that's entirely up to them. Therefore, I believe everything is in order.

Security measures are essential to allow users to perform permitted actions, while preventing unauthorized ones.

Answer №2

There doesn't seem to be much danger in a hacker getting hold of a date. The real risk lies in exposing more critical information like credit card numbers or user credentials that could potentially lead to unauthorized access on your site.

Since the data at hand is not classified as sensitive, it should be safe to keep it stored within a cookie.

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