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Shopify fix guide

Cookies Missing HttpOnly Flag on Shopify

Cookies are set without the HttpOnly flag, making them accessible to JavaScript. This increases the risk of cookie theft via XSS attacks.

Issue ID: SEC-COOKIE-HTTPONLY-001Severity: moderateEffort: S

Why this matters

Cookies are set without the HttpOnly flag, making them accessible to JavaScript. This increases the risk of cookie theft via XSS attacks. This affects browser trust signals and whether visitors feel safe submitting contact details.

Shopify fix path

How to fix this on Shopify

Use theme settings, page settings, or theme code.

  1. 1Find the source of the issue in Shopify admin.
  2. 2Apply the change.
  3. 3Preview and publish.

After you fix it

  • Inspect cookies in DevTools and confirm session cookies have the HttpOnly flag

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