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Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
3
PASS
9
INFO
0
Checks
12
9 PASS 3 REVIEW
C
Subresource Integrity
Action
2 of 4 external resources have SRI
REVIEW
2 of 4 external resources have SRI
Warning::
External link from api.fontshare.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://api.fontshare.com/v2/css?f[]=switzer@400,500,700&display=swap
Info::
link from cdnjs.cloudflare.com has SRI protection
Warning::
External script from challenges.cloudflare.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://challenges.cloudflare.com/turnstile/v0/api.js?render=explicit
Info::
script from static.cloudflareinsights.com has SRI protection
SRI Coverage 2 / 4 of external resources have integrity hashes
TagDomainIntegrity
<link>api.fontshare.com✗ Missing
<link>cdnjs.cloudflare.com✓ Protected
<script>challenges.cloudflare.com✗ Missing
<script>static.cloudflareinsights.com✓ Protected
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
B
security.txt
Published with 2 contact(s)
REVIEW

security.txt

Contact: mailto:security@troyhunt.com, https://twitter.com/troyhunt
Encryption: https://keybase.io/troyhunt
A
Security Headers
8 of 10 headers properly configured
PASS
8 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured
Got: max-age=31536000; includeSubDomains; preload
Info::
X-Content-Type-Options is properly configured
Got: nosniff
Info::
X-Frame-Options is properly configured
Got: DENY
Info::
Referrer-Policy is properly configured
Got: no-referrer-when-downgrade
Info::
Permissions-Policy is set
Got: accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=(), interest-cohort=()
Info::
Content-Security-Policy is present
Got: script-src 'self' cdnjs.cloudflare.com az416426.vo.msecnd.net ajax.cloudflare.co…
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

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

A+
Content Security Policy
9 of 10 CSP checks passed
PASS
9 of 10 CSP checks passed
Info::
Raw CSP policy
Got: script-src 'self' cdnjs.cloudflare.com az416426.vo.msecnd.net ajax.cloudflare.com challenges.cloudflare.com static.cloudflareinsights.com *.monitor.azure.com *.applicationinsights.io 'report-sample' 'sha256-cj00wrTvlrj8ekHe2A9FqhDO5X0mvSr/lzIuvFKuMmA=' 'nonce-Fp9sO/rTWQWSrQFp4ZYMZOwlATnYw5V9bS7v0thCxyw='; upgrade-insecure-requests; default-src 'none'; base-uri 'self'; worker-src 'self' blob:; style-src 'self' cdnjs.cloudflare.com api.fontshare.com 'report-sample' 'unsafe-inline'; img-src 'self' translate.google.com logos.haveibeenpwned.com haveibeenpwned.com cdnjs.cloudflare.com i.ytimg.com data:; font-src 'self' data: cdnjs.cloudflare.com cdn.fontshare.com fonts.scalar.com; frame-ancestors 'none'; frame-src challenges.cloudflare.com www.youtube.com; form-action 'self' www.paypal.com billing.stripe.com checkout.stripe.com billing.haveibeenpwned.com; connect-src 'self' stage.haveibeenpwned.com api.pwnedpasswords.com stage-api.haveibeenpwned.com api.haveibeenpwned.com haveibeenpwned.com dc.services.visualstudio.com *.in.applicationinsights.azure.com *.monitor.azure.com www.google.com translate.googleapis.com cdnjs.cloudflare.com; manifest-src 'self'; report-uri https://heimdall.report-uri.com/r/t/csp/enforce; report-to default
Info::
default-src directive is set
Got: default-src 'none'
Info::
No 'unsafe-inline' in script source
Info::
No 'unsafe-eval' in script source
Info::
No wildcard in script source
Info::
object-src falls back to default-src
Info::
base-uri is properly restricted
Got: base-uri 'self'
Info::
frame-ancestors directive is set
Got: frame-ancestors 'none'
Info::
form-action directive is set
Got: form-action 'self' www.paypal.com billing.stripe.com checkout.stripe.com billing.haveibeenpwned.com
Info::
upgrade-insecure-requests is enabled

Parsed Policy

script-src 'self'cdnjs.cloudflare.comaz416426.vo.msecnd.netajax.cloudflare.comchallenges.cloudflare.comstatic.cloudflareinsights.com*.monitor.azure.com*.applicationinsights.io'report-sample''sha256-cj00wrTvlrj8ekHe2A9FqhDO5X0mvSr/lzIuvFKuMmA=''nonce-Fp9sO/rTWQWSrQFp4ZYMZOwlATnYw5V9bS7v0thCxyw='
upgrade-insecure-requests
default-src 'none'
base-uri 'self'
worker-src 'self'blob:
style-src 'self'cdnjs.cloudflare.comapi.fontshare.com'report-sample''unsafe-inline'
img-src 'self'translate.google.comlogos.haveibeenpwned.comhaveibeenpwned.comcdnjs.cloudflare.comi.ytimg.comdata:
font-src 'self'data:cdnjs.cloudflare.comcdn.fontshare.comfonts.scalar.com
frame-ancestors 'none'
frame-src challenges.cloudflare.comwww.youtube.com
form-action 'self'www.paypal.combilling.stripe.comcheckout.stripe.combilling.haveibeenpwned.com
connect-src 'self'stage.haveibeenpwned.comapi.pwnedpasswords.comstage-api.haveibeenpwned.comapi.haveibeenpwned.comhaveibeenpwned.comdc.services.visualstudio.com*.in.applicationinsights.azure.com*.monitor.azure.comwww.google.comtranslate.googleapis.comcdnjs.cloudflare.com
manifest-src 'self'
report-uri https://heimdall.report-uri.com/r/t/csp/enforce
report-to default
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 80 days)
Got: 2026-07-11T15:03:21Z
Info::
Certificate chain has 3 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA256
Info::
Certificate covers 2 domain(s)
Got: haveibeenpwned.com, cloudflare-prometheus-exporter.haveibeenpwned.com
Info::
Certificate is issued by a trusted CA
Got: CN=WE1,O=Google Trust Services,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=haveibeenpwned.comIssuer CN=WE1,O=Google Trust Services,C=USValid 2026-04-12T14:03:22Z → 2026-07-11T15:03:21ZExpires in 80 days SANs haveibeenpwned.com, cloudflare-prometheus-exporter.haveibeenpwned.comSignature ECDSA-SHA256Serial a1f7d747958b401b1367bb2f6976be30
Intermediate (CA Certificate)
Subject CN=WE1,O=Google Trust Services,C=USIssuer CN=GTS Root R4,O=Google Trust Services LLC,C=USValid 2023-12-13T09:00:00Z → 2029-02-20T14:00:00ZExpires in 1035 days Signature ECDSA-SHA384Serial 7ff31977972c224a76155d13b6d685e3
Intermediate (CA Certificate)
Subject CN=GTS Root R4,O=Google Trust Services LLC,C=USIssuer CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BEValid 2023-11-15T03:43:21Z → 2028-01-28T00:00:42ZExpires in 646 days Signature SHA256-RSASerial 7fe530bf331343bedd821610493d8a1b
A+
Cookie Security
1 cookies analyzed, 2 checks passed
PASS
1 cookies analyzed, 2 checks passed
Info::
Cookie '__cf_bm' has the Secure flag
Info::
Cookie '__cf_bm' has the HttpOnly flag
Warning::
Cookie '__cf_bm' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
1 cookies analyzed 1 warnings
NameSecureHttpOnlySameSiteSizeIssues
__cf_bm✓✓—206 B1
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; rua=mailto:heimdall-t@dmarc.report-uri.com; ruf=mailto:heimdall-t@dmarc.report-uri.com; aspf=r; adkim=r
A+
Permissions-Policy
9 directives, 0 missing
PASS
9 directives, 0 missing
Info::
accelerometer=() — blocked for all origins
Info::
camera=() — blocked for all origins
Info::
geolocation=() — blocked for all origins
Info::
gyroscope=() — blocked for all origins
Info::
magnetometer=() — blocked for all origins
Info::
microphone=() — blocked for all origins
Info::
payment=() — blocked for all origins
Info::
usb=() — blocked for all origins
Info::
interest-cohort=() — blocked for all origins

Raw Header

accelerometer=() camera=() geolocation=() gyroscope=() magnetometer=() microphone=() payment=() usb=() interest-cohort=()

Feature Permissions

Blocked Self Only Unrestricted Not Set
accelerometer Blocked
camera Blocked
geolocation Blocked
gyroscope Blocked
magnetometer Blocked
microphone Blocked
payment Blocked
usb Blocked
interest-cohort Blocked
A+
Transport Security
HTTP/3, HSTS, and TLS version analysis
PASS
HTTP/3, HSTS, and TLS version analysis
Info::
HTTP/3 (QUIC) supported
The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks.
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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