Attributs de sécurité des cookies

Pourquoi c’est important

Cookies without the Secure, HttpOnly and SameSite flags can be sent over insecure connections, read by injected scripts or attached to cross-site requests. Session cookies are the most sensitive.

Comment corriger

1. Add Secure so the cookie is only sent over HTTPS.
2. Add HttpOnly to every cookie that JavaScript does not need to read.
3. Add SameSite=Lax (or Strict) to reduce cross-site request forgery.

Vérifier avec

• HTTP Headers Checker – View all HTTP response headers for a URL, with notes on the ones that matter for SEO.
• Security Headers Checker – Grade a site’s HTTP security headers (CSP, HSTS, X-Frame-Options and more).

Score : un contrôle réussi obtient tout son poids, un avertissement la moitié et une erreur rien. Fonctionnement du score SEO

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