Do not modify innerHTML or outerHTML

Docs > Code Analysis > Static Analysis Rules > Do not modify innerHTML or outerHTML

Cette page n'est pas encore disponible en français, sa traduction est en cours.
Si vous avez des questions ou des retours sur notre projet de traduction actuel, n'hésitez pas à nous contacter.

Metadata

ID: typescript-browser-security/inner-outer-html

Language: TypeScript

Severity: Warning

Category: Security

CWE: 79

Description

Properties like innerHTML and outerHTML should not be modified directly unless such modifications are clearly reviewed. Modifying innerHTML or outerHTML using user inputs that has not been validated can lead to XSS injection.

Learn More

Non-Compliant Code Examples

function nonCompliant(argument) {
  const content = '<div>' + argument + '</div>';
  document.write(content);
}

function nonCompliant(myArgument) {
  document.body.outerHTML = myArgument;
}

if (typeof(SERVER_DOMAIN) === 'undefined') {
   window.location.replace("/unconfigured.html");
}

const RECEIVE_URL = SERVER_DOMAIN + "/challenge_scoreboard.html" + "?origin=" + get_domain();

var window_ref = null;

document.getElementById("username").focus();

function store_username() {
   var username;
   var username_obj;

   username_obj = document.getElementById("username");
   username = username_obj.value

   var welcome;
   welcome = document.getElementById("welcome");
   welcome.innerHTML = "Welcome " + html_encode (username);

   var set_username;
   set_username = document.getElementById("set_username");
   set_username.style.display="none";

   var game;
   game = document.getElementById("game");
   game.style.display="inline";

   start_game();
   // have to do time out so the window can open
   setTimeout (function () {send_username(username);}, 1000);

   return false;
}