Is it possible for someone to manipulate the data being transmitted to the server if they have access to the data stored in a

I have some concerns regarding the security of my data. Let's consider a scenario where I have information stored in a div like this:

<div id="Q9vX" class="mainContent" data-compname="comp1" data-user="57f70c8e78ae49d41c78876a" data-shortid="Hy85nKVR">

Now, if I were to make a post request that sends the compname and user ID, is it possible for someone to tamper with the value of the data-user attribute before it gets sent? Considering that I am performing database operations based on the ID within the div, there is a risk of someone altering the ID and causing the operation to be performed for an unintended user. I am using MongoDB, Heroku, and Express for my project. Although I am hesitant about using sessions due to their expiration nature, what would be the best practice in such a situation?

For instance, imagine that this particular div pertains to a review submitted by a user with the ID 57f70c8e78ae49d41c78876a. If everything proceeds as expected and the user submits the review, it should be associated with that specific user ID. However, if someone were to manipulate the ID through tools like Firebug, could the review end up being registered under a different ID?

javascriptmongodbsecurityexpressheroku

Answer №1

To modify the value, a user could utilize developer tools or potentially conduct a cross-site scripting attack, where harmful code is injected into the page. There are various methods for executing this, such as inserting code onto your server's file system, injecting it into your database (especially if using a CMS), or even via a browser extension.

Without proper server-side access controls, someone could deploy a script that jeopardizes the availability or integrity of your data. Availability may be compromised through a denial of service attack inundating the server with fake requests to surpass concurrent database connections, inhibiting legitimate users from accessing the site. Data integrity can be at risk by flooding the database with fraudulent requests that are challenging and time-consuming to identify and remove. Additionally, if reviews function like a comment box allowing user input displayed on the site, it could serve as an avenue for injecting malicious cross-site scripting code.

If security is a concern, it's advisable to implement access control measures like sessions, sanitize all incoming and outgoing data from the database, and ensure secure HTTPS connection on your web server.

The Express JS website offers insightful guidance on security best practices.

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