What is Template Injection in Angular?

Template injection is an attack vector in Angular applications that allows malicious code to be injected into an Angular template. It is a type of injection attack which can be used to steal sensitive information or gain access to user accounts. Template injection is possible due to the fact that Angular templates are compiled in the browser, allowing malicious code to be injected. As such, it is important to understand how to protect against template injection in Angular applications.

What is Angular?

Angular is a popular JavaScript framework used to build interactive single-page web applications. It is designed to make the development process easier, faster, and more efficient. Angular allows developers to create sophisticated user interfaces with minimal effort. Angular utilizes HTML templates to define the structure of the application and the data that is displayed.

How Does Template Injection Work?

Template injection works by injecting malicious code into the application’s template. The code is usually inserted into the application’s template in the form of an expression or directive. The code is then executed in the browser when the application is rendered. The malicious code can then be used to access the application’s resources or to manipulate the user’s data.

How Can I Protect My Angular Application From Template Injection?

There are several steps that can be taken to protect an Angular application from template injection. The first step is to ensure that user input is strictly validated. All user input should be validated against a whitelist of allowed characters. Additionally, all user input should be escaped to prevent malicious code from being injected into the application’s template.

Another important step is to ensure that the application’s template is compiled securely. Angular templates can be compiled securely by using a secure template compiler such as the Angular template compiler. This will help to ensure that malicious code is not executed in the browser.

Finally, it is important to monitor the application’s template for any suspicious activity. If the application’s template is found to contain malicious code, it should be removed immediately.


Template injection is a serious security vulnerability in Angular applications. It is important to take the necessary steps to protect against template injection. This includes validating user input, using a secure template compiler, and monitoring the application’s template for any suspicious activity. Following these steps will help keep your Angular application secure.

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