Skip to content
https://www.brooklinen.com

Security

· 11 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
3
PASS
3
INFO
0
Checks
11
3 PASS 3 REVIEW 5 FIX
D
Cookie Security
Action
7 cookies analyzed, 11 checks passed
FIX
7 cookies analyzed, 11 checks passed
Critical::
Cookie 'localization' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Warning::
Cookie 'localization' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Warning::
Cookie 'localization' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
Critical::
Cookie 'cart_currency' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Warning::
Cookie 'cart_currency' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Warning::
Cookie 'cart_currency' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
Critical::
Cookie '_shopify_y' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Warning::
Cookie '_shopify_y' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie '_shopify_y' has SameSite=Lax
Critical::
Cookie '_shopify_s' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Warning::
Cookie '_shopify_s' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie '_shopify_s' has SameSite=Lax
Info::
Cookie '_shopify_essential' has the Secure flag
Info::
Cookie '_shopify_essential' has the HttpOnly flag
Info::
Cookie '_shopify_essential' has SameSite=Lax
Info::
Cookie '_shopify_analytics' has the Secure flag
Info::
Cookie '_shopify_analytics' has the HttpOnly flag
Info::
Cookie '_shopify_analytics' has SameSite=Lax
Info::
Cookie '_shopify_marketing' has the Secure flag
Info::
Cookie '_shopify_marketing' has the HttpOnly flag
Info::
Cookie '_shopify_marketing' has SameSite=Lax
7 cookies analyzed 4 critical 6 warnings
NameSecureHttpOnlySameSiteSizeIssues
localization✗✗—14 B3
cart_currency✗✗—16 B3
_shopify_y✗✗Lax46 B2
_shopify_s✗✗Lax46 B2
_shopify_essential✓✓Lax414 B—
_shopify_analytics✓✓Lax120 B—
_shopify_marketing✓✓Lax108 B—
D
Subresource Integrity
Action
1 of 66 external resources have SRI
FIX
1 of 66 external resources have SRI
Warning::
External script from analytics.tiktok.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://analytics.tiktok.com/i18n/pixel/events.js?sdkid=C7SQCJOFLK2NRAISUAC0&lib=ttq
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtag/js?id=G-80JGCF4NMJ&cx=c&gtm=4e6411h1
Warning::
External script from connect.facebook.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://connect.facebook.net/en_US/fbevents.js
Warning::
External script from www.redditstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.redditstatic.com/ads/pixel.js
Warning::
External script from s.pinimg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://s.pinimg.com/ct/core.js
Warning::
External script from bat.bing.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://bat.bing.com/bat.js
Warning::
External script from sc-static.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://sc-static.net/scevent.min.js
Warning::
External script from d.impactradius-event.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://d.impactradius-event.com/A2622372-7e79-4992-8e96-93d45cda04861.js
Warning::
External script from staticw2.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //staticw2.yotpo.com/MdtpPOdzecvdDWwA3pFvhLyB6ab4osWf5p8TQHpj/widget.js
Warning::
External script from collector-9286.us.tvsquared.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://collector-9286.us.tvsquared.com/tv2track.js
Warning::
External script from cdn.pdst.fm lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.pdst.fm/ping.min.js
Warning::
External script from raof9iiu.micpn.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //raof9iiu.micpn.com/p/js/1.js
Warning::
External script from tags.srv.stackadapt.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://tags.srv.stackadapt.com/events.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.shopify.com/proxy/6b454d2fbf1682130dd9656d35193e18b03e1547f8b6a196b63981f568636719/app.retention.com/shopify/shopify_app_add_to_cart_script.js?shop=brooklinen2.myshopify.com&sp-cache-control=cHVibGljLCBtYXgtYWdlPTkwMA
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.shopify.com/proxy/0d21f5643f07b9b35fb6a2545b69f8f5e07fd24b019614e2a19c20acdbc6590e/s3-us-west-2.amazonaws.com/jsstore/a/8M0HG3WJ/reids.js?shop=brooklinen2.myshopify.com&sp-cache-control=cHVibGljLCBtYXgtYWdlPTkwMA
Warning::
External script from sdk.postscript.io lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://sdk.postscript.io/sdk-script-loader.bundle.js?shopId=1664&shop=brooklinen2.myshopify.com
Warning::
External script from static-resources.botnot.io lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://static-resources.botnot.io/js/yofi-telemetry-prod.min.js?v=202510201606&shop=brooklinen2.myshopify.com
Warning::
External script from d38xvr37kwwhcm.cloudfront.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://d38xvr37kwwhcm.cloudfront.net/js/grin-sdk.js?shop=brooklinen2.myshopify.com
Warning::
External script from load.fomo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://load.fomo.com/api/v1/UZeRBMi0FrRz1kY4kx2mcA/load.js?shop=brooklinen2.myshopify.com
Warning::
External script from cdn.shoppinggives.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shoppinggives.com/cc-utilities/shopify.js?store-id=704331de-2cac-474b-8304-cfd002acb48d&shop=brooklinen2.myshopify.com
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtag/js?id=AW-973522331&cx=c&gtm=4e6420h2
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtm.js?id=GTM-N3WBV32
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/swym-ext-shopify.js
Warning::
External script from 2b36d2a1092a.cdn4.forter.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://2b36d2a1092a.cdn4.forter.com/sn/2b36d2a1092a/script.js
Warning::
External script from cdn.us.heap-api.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.us.heap-api.com/config/3048295484/heap_config.js
Warning::
External script from cdn.gladly.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.gladly.com/chat-sdk/widget.js?q=1775326859121
Warning::
External script from cdn.dynamicyield.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.dynamicyield.com/api/8768435/api_dynamic.js
Warning::
External script from cdn.dynamicyield.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.dynamicyield.com/api/8768435/api_static.js
Warning::
External script from st.dynamicyield.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //st.dynamicyield.com/st?sec=8768435&ref=&scriptVersion=2.83.0&inHead=true&id=0&jsession=4uuew5youblorp6oksahwuqpayzfvqd5&isSesNew=true&landingUrl=www.brooklinen.com&dyid_server=0&ctx=%7B%22type%22%3A%22HOMEPAGE%22%7D
Warning::
External script from rapid-cdn.yottaa.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://rapid-cdn.yottaa.com/rapid/lib/cTNGTFD40YMBwA.js
Warning::
External script from shop.app lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://shop.app/checkouts/internal/preloads.js?locale=en-US&shop_id=9517126
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/v1/loader/D06-6dZPUqA9vgYpJNuEhg
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/v1/loader/MdtpPOdzecvdDWwA3pFvhLyB6ab4osWf5p8TQHpj
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtag/js?id=AW-930458877
Warning::
External script from chat.siena.cx lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://chat.siena.cx/dist/webchat.js?appKey=6afa5786-49a6-4754-8db6-4fff55ece886
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/f2dc2781-781c-4b62-b8ed-c5471f514e1a/51194b6b0c9144e9e9b055cb483ad8365a43092e/assets/storefront-consent.js
Warning::
External script from cdn.cookielaw.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
Warning::
External link from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d1fd6-4f13-7903-90ac-15abcbd59a65/sbisa-shopify-app-142/assets/app-embed-block.css
Warning::
External script from brooklinen2.myshopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://brooklinen2.myshopify.com/apps/cm/unified.js?cb=1775326800000&source=embed
Warning::
External link from chat.siena.cx lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://chat.siena.cx/dist/siena-chat.css
Warning::
External link from accounts.google.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://accounts.google.com/gsi/style
Warning::
External script from cdn.ometria.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.ometria.com/tags/fda43d6576f9e8bf.js?v=fda43d6576f9e8bf
Warning::
External script from cdn.cookielaw.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.cookielaw.org/scripttemplates/202508.1.0/otBannerSdk.js
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/widget-assets/yotpo-pixel/2026-03-10_12-14-30/bundle.js
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/widget-assets/widgets-initializer/app.v0.9.8-7487.js
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/widget-assets/yotpo-pixel/2026-03-10_12-14-30/bundle.js
Warning::
External script from cdn-widgetsrepository.yotpo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn-widgetsrepository.yotpo.com/widget-assets/widgets-initializer/app.v0.9.8-7487.js
Warning::
External script from j.northbeam.io lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //j.northbeam.io/ota-sp/88e340b9-0e1f-4196-aca3-3ac14b8cf219.js
Info::
script from cdnjs.cloudflare.com has SRI protection
Warning::
External script from googleads.g.doubleclick.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://googleads.g.doubleclick.net/pagead/viewthroughconversion/930458877/?random=1775326862485&cv=11&fst=1775326862485&bg=ffffff&guid=ON&async=1&gtm=45be6420h2v889397952z876478298za200zd889397952xea&gcd=13t3t3t3t5l1&dma=0&tag_exp=0~115938466~115938468~116991817~118398310&u_w=800&u_h=600&url=https%3A%2F%2Fwww.brooklinen.com%2F&frm=0&tiba=Luxury%20Bedding%2C%20Sheets%20%26%20Comforters%20Online%20%7C%20Brooklinen&did=dN2ZkMj%2CdNTU0Yz%2CdYmNjMT&gdid=dN2ZkMj.dNTU0Yz.dYmNjMT&hn=www.googleadservices.com&rdp=0&npa=0&pscdl=noapi&auid=1098897632.1775326862&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=Linux&uapv=&uaw=0&_tu=KAI&data=ecomm_pagetype%3Dhome&rfmt=3&fmt=4
Warning::
External script from e.fomo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://e.fomo.com/api/v1/js-obj/UZeRBMi0FrRz1kY4kx2mcA/events/events.js?lng=en&sequence_id=1053
Warning::
External script from sdk.postscript.io lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://sdk.postscript.io/sdk.bundle.js?shopId=1664
Warning::
External script from accounts.google.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://accounts.google.com/gsi/client
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/swym-consent-manager.js
Warning::
External link from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/storefront-layout.css
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/async-wishlist-apis.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/storefront-layout.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/storefront-layout-components.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/swym-education-tooltip.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/swym-education.js
Warning::
External script from cdn.shopify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.shopify.com/extensions/019d5434-1150-7b3e-95ce-94c13b7b0a5f/swym-relay-721/assets/apps.bundle.js?v=4.0.0
Warning::
External script from dx.mountain.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://dx.mountain.com/spx?dxver=4.0.0&shaid=41057&tdr=&plh=https%3A%2F%2Fwww.brooklinen.com%2F&cb=51355534653012290term=value
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtag/js?id=AW-973522331
Warning::
External script from cdn.ometria.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.ometria.com/tags/fda43d6576f9e8bf.js
Warning::
External script from cdn.ometria.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.ometria.com/tags/fda43d6576f9e8bf.js
Warning::
External script from js.afterpay.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://js.afterpay.com/afterpay-1.x.js
SRI Coverage 1 / 66 of external resources have integrity hashes
TagDomainIntegrity
<script>analytics.tiktok.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>connect.facebook.net✗ Missing
<script>www.redditstatic.com✗ Missing
<script>s.pinimg.com✗ Missing
<script>bat.bing.com✗ Missing
<script>sc-static.net✗ Missing
<script>d.impactradius-event.com✗ Missing
<script>staticw2.yotpo.com✗ Missing
<script>collector-9286.us.tvsquared.com✗ Missing
<script>cdn.pdst.fm✗ Missing
<script>raof9iiu.micpn.com✗ Missing
<script>tags.srv.stackadapt.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>sdk.postscript.io✗ Missing
<script>static-resources.botnot.io✗ Missing
<script>d38xvr37kwwhcm.cloudfront.net✗ Missing
<script>load.fomo.com✗ Missing
<script>cdn.shoppinggives.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>2b36d2a1092a.cdn4.forter.com✗ Missing
<script>cdn.us.heap-api.com✗ Missing
<script>cdn.gladly.com✗ Missing
<script>cdn.dynamicyield.com✗ Missing
<script>cdn.dynamicyield.com✗ Missing
<script>st.dynamicyield.com✗ Missing
<script>rapid-cdn.yottaa.com✗ Missing
<script>shop.app✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>chat.siena.cx✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.cookielaw.org✗ Missing
<link>cdn.shopify.com✗ Missing
<script>brooklinen2.myshopify.com✗ Missing
<link>chat.siena.cx✗ Missing
<link>accounts.google.com✗ Missing
<script>cdn.ometria.com✗ Missing
<script>cdn.cookielaw.org✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>cdn-widgetsrepository.yotpo.com✗ Missing
<script>j.northbeam.io✗ Missing
<script>cdnjs.cloudflare.com✓ Protected
<script>googleads.g.doubleclick.net✗ Missing
<script>e.fomo.com✗ Missing
<script>sdk.postscript.io✗ Missing
<script>accounts.google.com✗ Missing
<script>cdn.shopify.com✗ Missing
<link>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>cdn.shopify.com✗ Missing
<script>dx.mountain.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>cdn.ometria.com✗ Missing
<script>cdn.ometria.com✗ Missing
<script>js.afterpay.com✗ Missing
F
Email Security
Action
No DMARC
FIX
No DMARC
Warning::
No DMARC record found
Without DMARC, email receivers have no policy for handling authentication failures.
DMARC

No DMARC record found

Without DMARC, email receivers have no policy for handling authentication failures from your domain.

Without DMARC, email receivers have no policy for handling authentication failures.

Why this matters

Without DMARC, anyone can send phishing emails using your domain name.

Learn more ▾

DMARC tells receiving mail servers what to do with email that fails SPF/DKIM checks for your domain. With a strict 'p=reject' policy, spoofed emails get bounced; without it they reach the inbox. Domains used in phishing campaigns lose deliverability and brand trust fast.

Source: DMARC.org / NIST

D
Permissions-Policy
Action
No header set
FIX
No header set
Warning::
No Permissions-Policy header
Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

No Permissions-Policy header set.

Without this header, embedded iframes can request access to sensitive device features.

Suggested header
Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=()
D
security.txt
Action
No /.well-known/security.txt published
FIX

security.txt

No security.txt found at /.well-known/security.txt

C
Security Headers
Action
5 of 10 headers properly configured
REVIEW
5 of 10 headers properly configured
Warning::
HSTS max-age is too short (7889238s, should be ≥ 31536000s)
A short max-age leaves a window for downgrade attacks. Set max-age to at least 31536000 (1 year).
Got: max-age=7889238 Expected: max-age=31536000; includeSubDomains
Info::
X-Content-Type-Options is properly configured
Got: nosniff
Info::
X-Frame-Options is properly configured
Got: DENY
Warning::
Referrer-Policy header is missing
Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
Expected: strict-origin-when-cross-origin
Warning::
Permissions-Policy header is missing
Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
Expected: geolocation=(), camera=(), microphone=()
Info::
Content-Security-Policy is present
Got: block-all-mixed-content; frame-ancestors 'none'; upgrade-insecure-requests;
Warning::
Cross-Origin-Opener-Policy header is missing
COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
Expected: same-origin
Warning::
Cross-Origin-Embedder-Policy header is missing
COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
Expected: require-corp
Info::
X-Powered-By header is not present
Info::
Server header is present without version info
Got: cloudflare

A short max-age leaves a window for downgrade attacks. Set max-age to at least 31536000 (1 year).

Expected: max-age=31536000; includeSubDomains
Why this matters

Short HSTS max-age leaves a downgrade-attack window every time the cache expires — set ≥ 1 year.

Learn more ▾

max-age below 31536000 (1 year) is below industry recommendation. The browser forgets the HSTS policy and re-exposes first-visit downgrade attacks. Set to 63072000 (2 years) and add `includeSubDomains; preload` to qualify for the HSTS preload list.

Source: RFC 6797 / hstspreload.org

Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.

Expected: strict-origin-when-cross-origin
Why this matters

Default browser behavior leaks full URLs (including query params and tokens) to every third-party resource — set a strict policy.

Learn more ▾

Without a Referrer-Policy header, browsers send the full referring URL with images, scripts, and fonts loaded from third-party origins. URLs containing tokens, user IDs, or session params end up in third-party logs. Set `Referrer-Policy: strict-origin-when-cross-origin` (or stricter) to limit leakage.

Source: MDN / W3C

Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.

Expected: geolocation=(), camera=(), microphone=()
Why this matters

Permissions-Policy locks down browser APIs you don't use — without it, every page can request camera/mic/geolocation if XSS lands.

Learn more ▾

By default every page can request the camera, microphone, geolocation, payment APIs, and dozens more. Permissions-Policy turns off the ones you don't need so a future bug can't quietly start using them. It's a defense-in-depth header — one line, big surface reduction.

Source: MDN / W3C

COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.

Expected: same-origin
Why this matters

COOP isolates your top-level browsing context from cross-origin windows — without it, popup-based side-channel attacks remain possible.

Learn more ▾

Cross-Origin-Opener-Policy: same-origin prevents cross-origin pages from sharing a browsing-context group with yours. This blocks cross-window references that enable Spectre-style timing attacks and tab-nabbing. Required if you want to enable SharedArrayBuffer.

Source: MDN / web.dev

COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.

Expected: require-corp
Why this matters

COEP enforces that all embedded resources opt-in to cross-origin embedding — required for cross-origin isolation features.

Learn more ▾

Cross-Origin-Embedder-Policy: require-corp ensures every embedded resource (script, iframe, image) explicitly allows being loaded cross-origin. Combined with COOP, this enables the cross-origin-isolated context that unlocks SharedArrayBuffer, high-resolution timers, and other powerful APIs.

Source: MDN / web.dev

B
Content Security Policy
3 of 10 CSP checks passed
REVIEW
3 of 10 CSP checks passed
Info::
Raw CSP policy
Got: block-all-mixed-content; frame-ancestors 'none'; upgrade-insecure-requests;
Warning::
default-src directive is missing
default-src provides a fallback for other directives. Set it to restrict default resource loading.
Expected: default-src 'self'
Info::
No script-src or default-src to check for 'unsafe-inline'
Info::
No script-src or default-src to check for 'unsafe-eval'
Info::
No script-src or default-src to check for wildcard
Info::
object-src falls back to default-src
Warning::
base-uri directive is missing
Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.
Expected: base-uri 'self'
Info::
frame-ancestors directive is set
Got: frame-ancestors 'none'
Warning::
form-action directive is missing
form-action restricts where forms can submit data, preventing form hijacking.
Expected: form-action 'self'
Info::
upgrade-insecure-requests is enabled

default-src provides a fallback for other directives. Set it to restrict default resource loading.

Expected: default-src 'self'
Why this matters

Security gaps expose your site and users to attacks, eroding trust.

Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.

Expected: base-uri 'self'
Why this matters

Missing base-uri in CSP leaves a base-tag injection attack path open even on otherwise strict policies.

Learn more ▾

A common omission: developers add CSP for script-src and frame-ancestors but forget base-uri. The result is a CSP that looks strict but lets an attacker rewrite every URL on the page via <base href>. Add `base-uri 'self'` to close the gap.

Source: MDN CSP

form-action restricts where forms can submit data, preventing form hijacking.

Expected: form-action 'self'
Why this matters

Security gaps expose your site and users to attacks, eroding trust.

Parsed Policy

block-all-mixed-content
frame-ancestors 'none'
upgrade-insecure-requests
B
CORS Configuration
No CORS headers
REVIEW
No CORS headers
Info::
No CORS headers present — secure default
CORS Configuration ✓ Secure

No CORS headers detected.

Cross-origin requests are blocked by browser same-origin policy.

Origin reflection test

Some servers mirror the request Origin header, which can be exploited. Test manually:

curl -sI -H "Origin: https://evil.com" <url> | grep -i access-control
A+
TLS & Certificates
TLS 1.3, 7 checks passed
PASS
TLS 1.3, 7 checks passed
Info::
TLS 1.3 is used
Got: TLS 1.3
Info::
Strong cipher suite is used
Got: TLS_CHACHA20_POLY1305_SHA256
Info::
HTTP/2 is not negotiated
HTTP/2 provides multiplexing and header compression for better performance.
Got: http/1.1
Info::
Certificate is valid (expires in 87 days)
Got: 2026-07-01T04:37:32Z
Info::
Certificate chain has 2 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA384
Info::
Certificate covers 1 domain(s)
Got: www.brooklinen.com
Info::
Certificate is issued by a trusted CA
Got: CN=E7,O=Let's Encrypt,C=US

HTTP/2 provides multiplexing and header compression for better performance.

Why this matters

HTTP/1.1 forces the browser to make sequential requests, multiplying latency on every page.

Learn more ▾

HTTP/2 (and HTTP/3) multiplex many requests over a single connection, eliminating head-of-line blocking. HTTP/1.1 forces the browser to either queue requests or open many parallel connections — both worse. Most modern web servers support HTTP/2 with one config line.

Source: MDN Web Docs

Connection
Protocol
TLS 1.3
Cipher Suite
TLS_CHACHA20_POLY1305_SHA256
HTTP Version
HTTP/1.1

Certificate Chain

Leaf Certificate
Subject CN=www.brooklinen.comIssuer CN=E7,O=Let's Encrypt,C=USValid 2026-04-02T04:37:33Z → 2026-07-01T04:37:32ZExpires in 87 days SANs www.brooklinen.comSignature ECDSA-SHA384Serial 65199a466bf0c23703f6268f062e11887af
Intermediate (CA Certificate)
Subject CN=E7,O=Let's Encrypt,C=USIssuer CN=ISRG Root X1,O=Internet Security Research Group,C=USValid 2024-03-13T00:00:00Z → 2027-03-12T23:59:59ZExpires in 342 days Signature SHA256-RSASerial aa75f1e62b8f0a220966d38bbfd4baa1
A+
JS Library Vulnerabilities
No known vulnerabilities
PASS
No known vulnerabilities
Info::
No known JavaScript library vulnerabilities detected

No known JavaScript library vulnerabilities detected.

A+
Information Leakage
No exposures
PASS
No exposures
Info::
No security.txt found
Consider adding a security.txt at /.well-known/security.txt.
Info::
No sensitive files exposed

No sensitive files exposed — all paths returned 404.

PathStatusCategoryRisk
/.git/HEAD✓ Not foundVersion Control—
/.git/config✓ Not foundVersion Control—
/.svn/entries✓ Not foundVersion Control—
/.env✓ Not foundConfiguration—
/.env.local✓ Not foundConfiguration—
/.env.production✓ Not foundConfiguration—
/wp-config.php✓ Not foundConfiguration—
/.htaccess✓ Not foundConfiguration—
/phpinfo.php✓ Not foundDebug—
/server-status✓ Not foundDebug—
/server-info✓ Not foundDebug—
/.well-known/security.txt✓ Not foundSecurity Policy—
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback