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Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
69
GRADE
D
FIX
3
REVIEW
4
PASS
5
INFO
0
Checks
12
5 PASS 4 REVIEW 3 FIX
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 20 external resources have SRI
FIX
0 of 20 external resources have SRI
Warning::
External script from cdn.jsdelivr.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://cdn.jsdelivr.net/npm/search-insights@2.17.3
Warning::
External script from t.ixdf.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://t.ixdf.org/gtm.js?id=GTM-KJ8XGB&gtg_health=1
Warning::
External script from t.ixdf.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c&gtm=4e64k1
Warning::
External script from t.ixdf.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://t.ixdf.org/gtm.js?id=GTM-KJ8XGB
Warning::
External link from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/tailwind-DxFDGO_n.css
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/bugsnag-1RJHgweM.js
Warning::
External link from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/video-poster-mQbsni6a.css
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/app-CGlU-aIG.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/course-DfCRK5qh.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/masterclass-BzX_SUpJ.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/staggerRevealer-D9U4066z.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/scrollRevealer-BcK13X9l.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/stepRevealer-DayWEkd0.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/bootstrap-BmKlTEo4.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/belowTheFold-BDyaSEvc.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/consentBanner-yKy0vSZM.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/parallax-logos-BqRTuheS.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/home--guest-DENvcSXh.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/input-group-DFiLuqyD.js
Warning::
External script from assets.interaction-design.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://assets.interaction-design.org/build/assets/accordionList-DzqSkMOE.js
SRI Coverage 0 / 20 of external resources have integrity hashes
TagDomainIntegrity
<script>cdn.jsdelivr.net Missing
<script>t.ixdf.org Missing
<script>t.ixdf.org Missing
<script>t.ixdf.org Missing
<link>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<link>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
<script>assets.interaction-design.org Missing
D
Email Security
Action
DMARC: none
FIX
DMARC: none
Warning::
DMARC policy is none — monitoring only
This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject.
DMARC
Policy none — monitoring only, does not block spoofing Record v=DMARC1; p=none; pct=100; fo=1; rua=mailto:cce30f6a@dmarc.mailgun.org,mailto:25a4db9b@inbox.ondmarc.com; ruf=mailto:cce30f6a@dmarc.mailgun.org;

This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject.

Why this matters

DMARC p=none collects reports but doesn't actually block spoofed mail — phishing emails still reach inboxes.

Learn more

DMARC's three policies are p=none (monitor only), p=quarantine (mark as spam), and p=reject (bounce). Most domains start at p=none to gather data, but stay there forever, leaving spoofers unblocked. After 30 days of clean DMARC reports, graduate to p=quarantine, then p=reject.

Source: DMARC.org / NIST

B
Security Headers
7 of 10 headers properly configured
REVIEW
7 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: SAMEORIGIN
Info::
Referrer-Policy is properly configured
Got: no-referrer-when-downgrade
Info::
Permissions-Policy is set
Got: ch-dpr=(self "https://public-images.interaction-design.org"), ch-width=(self "https://public-images.interaction-design.org")
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 present without version info
Got: cloudflare

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

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

C
Permissions-Policy
Action
2 directives, 5 missing
REVIEW
2 directives, 5 missing
Info::
ch-dpr=(self "https://public-images.interaction-design.org")
Info::
ch-width=(self "https://public-images.interaction-design.org")
Info::
camera not restricted
Consider adding camera=() to block camera access from embedded content.
Info::
microphone not restricted
Consider adding microphone=() to block microphone access from embedded content.
Info::
geolocation not restricted
Consider adding geolocation=() to block geolocation access from embedded content.
Info::
payment not restricted
Consider adding payment=() to block payment access from embedded content.
Info::
usb not restricted
Consider adding usb=() to block usb access from embedded content.

Raw Header

ch-dpr=(self "https://public-images.interaction-design.org") ch-width=(self "https://public-images.interaction-design.org")

Feature Permissions

Blocked Self Only Unrestricted Not Set
ch-dpr (self "https://public-images.interaction-design.org") (1 origins)
ch-width (self "https://public-images.interaction-design.org") (1 origins)
camera Not Set
microphone Not Set
geolocation Not Set
payment Not Set
usb Not Set
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 1 contact(s)
REVIEW

security.txt

Contact: https://ixdf.org/about/contact
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 73 days)
Got: 2026-07-05T12:46:07Z
Info::
Certificate chain has 2 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA384
Info::
Certificate covers 2 domain(s)
Got: *.ixdf.org, ixdf.org
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=ixdf.orgIssuer CN=E7,O=Let's Encrypt,C=USValid 2026-04-06T12:46:08Z → 2026-07-05T12:46:07ZExpires in 73 days SANs *.ixdf.org, ixdf.orgSignature ECDSA-SHA384Serial 551cb52d8ff8c2e79d31e46ee521ab422f8
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 324 days Signature SHA256-RSASerial aa75f1e62b8f0a220966d38bbfd4baa1
A+
Cookie Security
2 cookies analyzed, 5 checks passed
PASS
2 cookies analyzed, 5 checks passed
Info::
Cookie 'XSRF-TOKEN' has the Secure flag
Warning::
Cookie 'XSRF-TOKEN' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'XSRF-TOKEN' has SameSite=Lax
Info::
Cookie 'ixdf_session_v1' has the Secure flag
Info::
Cookie 'ixdf_session_v1' has the HttpOnly flag
Info::
Cookie 'ixdf_session_v1' has SameSite=Lax
2 cookies analyzed 1 warnings
NameSecureHttpOnlySameSiteSizeIssues
XSRF-TOKENLax352 B1
ixdf_session_v1Lax357 B
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+
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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