spring security 403 error

The issue is likely due to CSRF protection. If users will not be using your application in a web browser, then it is safe to disable CSRF protection. Otherwise you should ensure to include the CSRF token in the request.

To disable CSRF protection you can use the following:

@Configuration
@EnableWebSecurity
public class WebSecurityConfig
    extends WebSecurityConfigurerAdapter implements ApplicationContextAware {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            // ...
            .csrf().disable();
    }

    @Override
    protected void registerAuthentication(AuthenticationManagerBuilder authManagerBuilder) throws Exception {
        authManagerBuilder
            .inMemoryAuthentication()
                .withUser("user").password("password").roles("ADMIN");
    }
}

The issue may be related to CSRF or CORS Security Protection.

• FOR CSRF: You can disable it if the application users did not use it from browsers.
• For CORS: You can specify the origin and allow HTTP Methods.

The below code disable CSRF and allow all origins and HTTP methods. so be aware when using it.

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter  implements WebMvcConfigurer {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable();
    }

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**").allowedMethods("*");
    }

}