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Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
64
GRADE
D
FIX
4
REVIEW
3
PASS
5
INFO
0
Checks
12
5 PASS 3 REVIEW 4 FIX
D
Security Headers
Action
4 of 10 headers properly configured
FIX
4 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured
Got: max-age=31536000; includeSubDomains; preload
Warning::
X-Content-Type-Options header is missing
This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
Expected: nosniff
Info::
X-Frame-Options is properly configured
Got: SAMEORIGIN
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=()
Critical::
Content-Security-Policy header is missing
CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
Expected: default-src 'self'
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 not present

CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.

Expected: default-src 'self'
Why this matters

Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.

Learn more ▾

Content-Security-Policy is the browser-enforced firewall against XSS. With a strict CSP, a script injection that would otherwise steal session cookies or rewrite the page is silently blocked. Without it, your only defense is hoping every input on every form is escaped correctly forever.

Source: OWASP / MDN

This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.

Expected: nosniff
Why this matters

MIME sniffing lets browsers run uploaded files as JavaScript, turning a file upload into an XSS.

Learn more ▾

Setting X-Content-Type-Options: nosniff tells browsers to trust your declared Content-Type instead of guessing. Without it, an attacker who uploads a polyglot file can sometimes get it executed as a script. One header, no downside.

Source: OWASP / MDN

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

F
Content Security Policy
Action
No enforcing CSP policy found
FIX
No enforcing CSP policy found
Critical::
No Content-Security-Policy header found
CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.
Expected: default-src 'self'

CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

Expected: default-src 'self'
Why this matters

Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.

Learn more ▾

Content-Security-Policy is the browser-enforced firewall against XSS. With a strict CSP, a script injection that would otherwise steal session cookies is silently blocked. Without it, your only defense is hoping every input on every form is escaped correctly forever. Start in Report-Only mode, fix violations, then graduate to enforcing.

Source: OWASP / MDN

F
Subresource Integrity
Action
0 of 37 external resources have SRI
FIX
0 of 37 external resources have SRI
Warning::
External script from d34r8q7sht0t9k.cloudfront.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://d34r8q7sht0t9k.cloudfront.net/tag.js
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 ct.pinterest.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://ct.pinterest.com/static/ct/token_create.js
Warning::
External script from js.appboycdn.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://js.appboycdn.com/web-sdk/6.1/braze.no-module.min.js
Warning::
External script from sneakpeek-1.s3.us-east-1.amazonaws.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://sneakpeek-1.s3.us-east-1.amazonaws.com/acquaint_b2b_chord.js
Warning::
External script from tr.snapchat.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://tr.snapchat.com/config/com/3600a646-89ef-468e-9207-93ef7c0195aa.js?v=3.56.0-2604221701
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/static/identify_5cff1caf.js
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/static/main.MWE0ZWQ3ZWQwOQ.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/lib/main.10d2511a.js
Warning::
External script from pixel.byspotify.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://pixel.byspotify.com/ping.min.js
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=CAHP3ORC77UDEFJHCHG0&lib=ttq
Warning::
External script from scripts.postie.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //scripts.postie.com/xpwmdbxr/lp.1.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 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 www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.googletagmanager.com/gtag/destination?id=DC-13670001&cx=c&gtm=4e64k1
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 unpkg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://unpkg.com/web-vitals/dist/web-vitals.iife.js
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-DFV9V8HH8T&cx=c&gtm=4e64k1
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=DC-4273294&cx=c&gtm=4e64k1
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 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-WRJKFWM
Warning::
External script from forms.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //forms.sonos.com/w37htfhcq2/vendor/b438b2ba-e8de-42c1-938e-5fc1ebffe53b/main.js?cb=8DCB3ECB413095BC01D1B29BF4757228
Warning::
External script from forms.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //forms.sonos.com/w37htfhcq2/vendor/b438b2ba-e8de-42c1-938e-5fc1ebffe53b/custom.js?cb=4F53A15F5F88BDE764A6BFCA62616210
Warning::
External script from forms.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //forms.sonos.com/w37htfhcq2/vendor/b438b2ba-e8de-42c1-938e-5fc1ebffe53b/user.js?cb=639118805549521126
Warning::
External script from forms.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://forms.sonos.com/w37htfhcq2/vendor/b438b2ba-e8de-42c1-938e-5fc1ebffe53b/lightbox_speed.js
Warning::
External link from forms.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://forms.sonos.com/w37htfhcq2/static/fb_lightbox.2.1.5.css?cb=20240725
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/202505.2.0/otBannerSdk.js
Warning::
External script from analytics.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://analytics.sonos.com/p.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/p/action/4072712.js
Warning::
External script from assets.xgen.dev lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.xgen.dev/js/eem4cxrciz6hws0zfp1i6yjzi5yxi40k/sdkIntegration.js
Warning::
External link from use.fontawesome.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://use.fontawesome.com/7f85a56ba4.css
Warning::
External script from t.contentsquare.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //t.contentsquare.net/uxa/0ad82fc9-ef51-4833-83db-2e9207f7b731.js
Warning::
External script from ct.contentsquare.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://ct.contentsquare.net/ptc/0ad82fc9-ef51-4833-83db-2e9207f7b731.js
Warning::
External script from assets.xgen.dev lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.xgen.dev/js/eem4cxrciz6hws0zfp1i6yjzi5yxi40k/gtmIntegration.js
Warning::
External script from assets.sonos.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.sonos.com/optimizelyjs/3058550533.js
Warning::
External script from js.adsrvr.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://js.adsrvr.org/up_loader.1.1.0.js
SRI Coverage 0 / 37 of external resources have integrity hashes
TagDomainIntegrity
<script>d34r8q7sht0t9k.cloudfront.net✗ Missing
<script>connect.facebook.net✗ Missing
<script>www.redditstatic.com✗ Missing
<script>ct.pinterest.com✗ Missing
<script>js.appboycdn.com✗ Missing
<script>sneakpeek-1.s3.us-east-1.amazonaws.com✗ Missing
<script>tr.snapchat.com✗ Missing
<script>analytics.tiktok.com✗ Missing
<script>analytics.tiktok.com✗ Missing
<script>s.pinimg.com✗ Missing
<script>pixel.byspotify.com✗ Missing
<script>analytics.tiktok.com✗ Missing
<script>scripts.postie.com✗ Missing
<script>sc-static.net✗ Missing
<script>s.pinimg.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>bat.bing.com✗ Missing
<script>unpkg.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>cdn.cookielaw.org✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>forms.sonos.com✗ Missing
<script>forms.sonos.com✗ Missing
<script>forms.sonos.com✗ Missing
<script>forms.sonos.com✗ Missing
<link>forms.sonos.com✗ Missing
<script>cdn.cookielaw.org✗ Missing
<script>analytics.sonos.com✗ Missing
<script>bat.bing.com✗ Missing
<script>assets.xgen.dev✗ Missing
<link>use.fontawesome.com✗ Missing
<script>t.contentsquare.net✗ Missing
<script>ct.contentsquare.net✗ Missing
<script>assets.xgen.dev✗ Missing
<script>assets.sonos.com✗ Missing
<script>js.adsrvr.org✗ Missing
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=()
C
Cookie Security
Action
2 cookies analyzed, 1 checks passed
REVIEW
2 cookies analyzed, 1 checks passed
Info::
Cookie '_abck' has the Secure flag
Warning::
Cookie '_abck' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Warning::
Cookie '_abck' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
Critical::
Cookie 'bm_sz' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Warning::
Cookie 'bm_sz' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Warning::
Cookie 'bm_sz' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
2 cookies analyzed 1 critical 4 warnings
NameSecureHttpOnlySameSiteSizeIssues
_abck✓✗—512 B2
bm_sz✗✗—410 B3
C
CORS Configuration
Action
Origin: *
REVIEW
Origin: *
Info::
Access-Control-Allow-Origin: * — unrestricted
Any website can read this resource's response. Appropriate for public APIs but not for user-specific content.
Info::
Origin reflection not testable with a single request
Some servers reflect the request Origin header. This requires manual testing with a crafted Origin header.
CORS Configuration Permissive
Allow-Origin *

Any website can read responses from this resource.

HeaderValueStatus
Access-Control-Allow-Origin*⚠

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
B
security.txt
Published with 1 contact(s)
REVIEW

security.txt

Contact: mailto:security@sonos.com
Encryption: https://s3.amazonaws.com/public-pgp-snssec/sonos-security.pgp
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 282 days)
Got: 2027-01-29T23:59:59Z
Info::
Certificate chain has 4 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA256
Info::
Certificate covers 2 domain(s)
Got: www.sonos.com, sonos.com
Info::
Certificate is issued by a trusted CA
Got: CN=Sectigo Public Server Authentication CA OV E36,O=Sectigo Limited,C=GB

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.sonos.com,O=Sonos\, Inc.,ST=California,C=USIssuer CN=Sectigo Public Server Authentication CA OV E36,O=Sectigo Limited,C=GBValid 2026-01-20T00:00:00Z → 2027-01-29T23:59:59ZExpires in 282 days SANs www.sonos.com, sonos.comSignature ECDSA-SHA256Serial be2071dd31487f330248779367fa6a04
Intermediate (CA Certificate)
Subject CN=Sectigo Public Server Authentication CA OV E36,O=Sectigo Limited,C=GBIssuer CN=Sectigo Public Server Authentication Root E46,O=Sectigo Limited,C=GBValid 2021-03-22T00:00:00Z → 2036-03-21T23:59:59ZExpires in 3621 days Signature ECDSA-SHA384Serial 12b0648be8e2b91074216c1dae9c5795
Intermediate (CA Certificate)
Subject CN=Sectigo Public Server Authentication Root E46,O=Sectigo Limited,C=GBIssuer CN=USERTrust ECC Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=USValid 2021-03-22T00:00:00Z → 2038-01-18T23:59:59ZExpires in 4289 days Signature ECDSA-SHA384Serial 1a9eafec6de8e19b5c193141b68d90dd
Intermediate (CA Certificate)
Subject CN=USERTrust ECC Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=USIssuer CN=USERTrust ECC Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=USValid 2010-02-01T00:00:00Z → 2038-01-18T23:59:59ZExpires in 4289 days Signature ECDSA-SHA384Serial 5c8b99c55a94c5d27156decd8980cc26
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::
security.txt is present — good practice
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✗ ExposedSecurity PolicyInfo
A+
Email Security
DMARC: reject
PASS
DMARC: reject
Info::
DMARC policy is reject — strongest protection
DMARC
Policy reject — strongest protection Record v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com,mailto:dmarc_agg@dmarc.everest.email;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com,mailto:dmarc_fr@dmarc.everest.email
A
Transport Security
HTTP/3, HSTS, and TLS version analysis
PASS
HTTP/3, HSTS, and TLS version analysis
Info::
HTTP/3 (QUIC) not advertised
HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
Info::
HSTS enabled (includeSubDomains, preload)
Info::
HSTS preload enabled
Info::
TLS 1.3 in use (fastest handshake, 1-RTT)
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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