Specify origin in postMessage

Docs > Plateforme de sécurité Datadog > Code Security > Static Analysis (SAST) > SAST Rules > Specify origin in postMessage

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: javascript-browser-security/postmessage-permissive-origin

Language: JavaScript

Severity: Warning

Category: Security

CWE: 923

Description

Always specify the origin of the message for security reasons and to avoid spoofing attacks. Always specify an exact target origin, not *, when you use postMessage to send data to other windows.

Learn More

window.postMessage documentation

Non-Compliant Code Examples

window.postMessage(message, '*')

Compliant Code Examples

window.postMessage(message, 'https://app.domain.tld')

How to use this rule

1
2
rulesets:
  - javascript-browser-security     # Rules to enforce JavaScript browser security.

Create a static-analysis.datadog.yml with the content above at the root of your repository
Use our free IDE Plugins or add Code Security scans to your CI pipelines
Get feedback on your code

For more information, please read the Code Security documentation

VS Code Extension

Identify code vulnerabilities directly in your
VS Code editor

JetBrains Plugin

Identify code vulnerabilities directly in
JetBrains products