Angular is one of the most famous JavaScript framework for developing single-page web applications. These web apps have proven to be immensely vulnerable to cyberattacks from several sources. So, everyone’s responsibility is to safeguard their data. Here, we will help you build a secure Angular app by providing 5 Most Reliable Practices to Maintain Angular App Security. 

Making the app safe and comprehensive should prioritize every product owner as it is crucial to deliver a tension-free experience to users. Following are the most reliable practices recommended to prevent vulnerabilities in your app.

Table of Contents

• Avoid Cross-site Scripting (XSS)
• Sanitization
• Block Vulnerabilities related to HTTP
• Cross-site Request Forgery
• Cross-site Script Inclusion (XSSI)
• Prevent Risky Angular APIs
• Stay in Touch with Latest Angular Library
• No Need to Customize Angular Files
• Conclusion

Avoid Cross-site Scripting (XSS)

Anyone can inject their malicious scripts into DOM elements to steal your website information, like web tokens or essential credentials. There are several ways that cybercriminals can inject their malicious scripts; one such easy is by adding a <script> tag. For example, they might insert text fields or pop-ups to obtain user information. Another menacing malfunction they might implement is to insert <a> tags, which, if a user taps them, will take the user to some inappropriate website.

To prevent such kinds of cruel activities, any values inserted into a page must be sanitized. Unfortunately, angular considers every value as unreliable by default. So, every user’s responsibility is to filter them before they are included.

Sanitization

This process of validating unreliable values depends on various contexts. The security contexts are attributes (binding values), style (CSS), HTML(binding inner HTML), and resources (referring to files). You will have to convert the unreliable values provided by users into reliable values with tools like DomSanitizer.

import { Component, OnInit } from '@angular/core';
import { SecurityService } from './data.service';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
@Component({
  selector: 'app-root',
  template: `<div [innerHtml] = "safeValue"></div>`,
  providers: [SecurityService]
})
export class AppComponent implements OnInit {
  safeValue: SafeHtml;
  constructor(private secure: SecurityService) {
    this.safeValue = this.secure.getSafeHtml("<h1>Sanitization Success</h1>");
  }
  ngOnInit() {
  }
}

You have to include a <h1> tag within the div and bind InnerHtml and the SafeValue attribute. It is crucial to use attribute binging while conducting sanitization. So, we pass the HTML string to our service technicians to get a secured value.

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