AngularJS has several security fundamentals that developers should follow to ensure secure coding practices. It's essential to avoid dynamically loading Angular templates from untrusted sources, as this can introduce security risks. Additionally, users should avoid using the Angular `.element` jQuery-compatible API to manipulate the DOM, as this can lead to Cross-site Scripting vulnerabilities. Scanning and fixing vulnerabilities in third-party components is also crucial, especially since AngularJS has over 20 known security vulnerabilities across its version branch. Furthermore, developers should use built-in features like CSRF support and Content Security Policy (CSP) compatibility to enhance security. By following these best practices, developers can help protect their AngularJS applications from common web security threats.