crose-site issues in angular

Question

this template literal looks like html and has interpolated variables.These variables are
not html-encode by default. If the vaiables contain html tags, these may be
interpreted by the broser, resulting in cross-site scripting(xss)

this.id =`<img src ="4{'DATA:IMAGE/PNG;
BASE64,' + this.innerHtml}" alt =Sign
is missing" title="sigin" >`

this giving cross-site scripting can you provide solution

Rajkiran Swain · Answer

To prevent cross-site scripting (XSS) vulnerabilities, it is important to properly sanitize and encode any user-generated or dynamic content that is being inserted into HTML. In your case, you can use Angular's built-in sanitization mechanisms to sanitize the interpolated variables before inserting them into the HTML. Here's an example of how you can sanitize and encode the this.innerHtml variable in your Angular code: First, import the necessary modules in your component: import { DomSanitizer, SafeHtml } from '@angular/platform-browser'; Then, inject the DomSanitizer into your component's constructor: constructor(private sanitizer: DomSanitizer) { } Next, update your code to use the bypassSecurityTrustHtml method provided by the DomSanitizer to sanitize and encode the this.innerHtml variable: // Import SafeHtml from '@angular/platform-browser' if not imported already // ... // Sanitize and encode the this.innerHtml variable const sanitizedHtml: SafeHtml = this.sanitizer.bypassSecurityTrustHtml(this.innerHtml); // Update the this.id with the sanitized and encoded HTML this.id = ` `; By using the bypassSecurityTrustHtml method, Angular will mark the HTML content as safe and it won't be treated as potentially dangerous, mitigating the risk of XSS vulnerabilities. Remember to import the necessary modules and inject the DomSanitizer in your component as shown above. Note: It is important to validate and sanitize user-generated or dynamic content from trusted sources to ensure the security of your application.

crose-site issues in angular

Answers (1)