Security is a typical concern while developing HYBRID applications, as long as your application can be reverse-engineered.

• Ionic CLI has had built-in code uglification since version 4, which is a typical approach for making code difficult to read by hackers. However, you should be aware that there is no code uglification when using Angular CLI or previous versions of Ionic. Your programmers will have to uglify the code themselves.
• A man-in-the-middle attack is ONE of several ways to compromise what's going on with your mobile application or PWA. What difference does it make? Because, in essence, your Ionic application is a web page that runs on the device. The crucial point to remember is that Ionic connects with the backend via standard HTTP calls. As a result, you'll want to apply the same security protections to your Ionic application that you do to your website, such as using HTTPS instead of HTTP.
• Developers can include CUSTOM or user-provided content in components like ion-alert. This content, which can be plain text or HTML, should be regarded as untrustworthy. Before doing anything else with any untrusted information, it's critical to sanitise it. Using innerHTML without sanitization, for instance, presents an attack vector for bad actors to insert malicious material and potentially conduct a Cross-Site Scripting attack (XSS).  Ionic includes basic sanitization methods for the components it offers, but it is up to the developer to ensure that all DATA is sanitised for user-created components.
• If an attacker finds a flaw in an application's code (for instance, a third-party API call or a JavaScript package), they may find a way to exploit it such that malicious code is executed instead. The Content Security Policy (CSP) META tag was created to aid in the prevention of such attacks by specifying which network requests are permitted and where assets are loaded from. You'll observe that Ionic apps for iOS and Android often use Cordova's Network Whitelist Plugin to protect webviews that don't support CSP from cross-site scripting.