Manipulation invisible fields android app

simone bruziches
simone bruziches used Ask the Experts™
Sorry if I didn't post the code, but my question is purely theoretical.

I am creating an android app, where in the Login activity the login credentials are entered by the app automatically (after an authentication via SMS) in the EditText GONE and are sent to the server.

Is it a problem if the php code is vulnerable to SQL Injection?

Would some attacker be able to manipulate the hidden fields of my application?
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Is the backend API your app is talking to written in PHP? Regardless, you should never trust user inputs no matter where they come from and always take steps to sanitize their inputs to prevent SQL attacks. Even a non-compromised app should be unable to directly run database commands.

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