kmart.com.au

Readiness by lane

Green: kmart.com.au. Thin bar: E-Commerce & Marketplaces peer median.

Priority fixes for kmart.com.au

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Harden

   HSTS kept for at least a year

   Observed: Strict-Transport-Security was sent with a max-age of 1 days, below the one-year benchmark.

   Why it matters: HSTS tells browsers to use HTTPS for your host on every later visit, which removes the window where a first HTTP request can be intercepted.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   On Next.js: Add the header in the headers() option of next.config.js for all routes.

   32% of E-Commerce & Marketplaces peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Harden

   Framing restricted

   Observed: The homepage did not send frame-ancestors or X-Frame-Options, so other sites may frame it.

   What to do: Send Content-Security-Policy: frame-ancestors 'self' (or a list of trusted origins). X-Frame-Options: SAMEORIGIN covers older browsers.

   On Next.js: Add it in next.config.js headers().

   70% of E-Commerce & Marketplaces peers do this.

   Guide: A Practical Website Health Check for Owners

3. Priority 3 · Harden

   Content Security Policy present

   Observed: The homepage response did not include a Content-Security-Policy header.

   What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

   On Next.js: Next.js documents nonce-based CSP with middleware.

   48% of E-Commerce & Marketplaces peers do this.

   Guide: Payment Security and PCI DSS: What Website Owners Need to Know

4. Priority 4 · Harden

   Certificate lifetime of 100 days or less

   Observed: The certificate from DigiCert Inc had a 198-day validity period, longer than the 100-day maximum that applies from March 2027.

   What to do: Move to automated issuance and renewal now, while you still have time to test it.

   70% of E-Commerce & Marketplaces peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

What kmart.com.au already does well

Practices fewer than half of E-Commerce & Marketplaces peers use.

• Nameservers spread across providersNameservers spread across more than one operator.11% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.39% of peers
• Reachable over IPv6IPv6 address published.40% of peers

What we saw

Homepage checked

https://www.kmart.com.au/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

DigiCert, 198-day validity, expiring 2027-02-04

CDN or edge

Akamai

Platform or framework

Next.js

DNS operators

2 self-run or other nameserver domains

HSTS

max-age 1 days

DMARC policy

p=reject

Homepage HTML

2,957 KB, br

Images on homepage

101 (png 224, jpg 91)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other E-Commerce & Marketplaces sites

• jwpei.com73
• jysk.ch73
• kaufda.de73
• kotte-zeller.de73
• lazada.sg73

E-Commerce & Marketplaces readiness benchmark