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

Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
71
GRADE
C
FIX
3
REVIEW
4
PASS
5
INFO
0
Checks
12
5 PASS 4 REVIEW 3 FIX
F
Subresource Integrity
Action
0 of 6 external resources have SRI
FIX
0 of 6 external resources have SRI
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-9189202&cx=c&gtm=4e6460
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-T4QN7PF3&gtm=4e6460
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@5.0.1/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-TRCPE14CWT&cx=c&gtm=4e6460
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-575TF4H&gtm_auth=afdbAXrh3-yNk9m3Wq79uw&gtm_preview=env-1
Warning::
External script from cdn.cookielaw.org lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.cookielaw.org/scripttemplates/otSDKStub.js
SRI Coverage 0 / 6 of external resources have integrity hashes
TagDomainIntegrity
<script>www.googletagmanager.com Missing
<script>www.googletagmanager.com Missing
<script>unpkg.com Missing
<script>www.googletagmanager.com Missing
<script>www.googletagmanager.com Missing
<script>cdn.cookielaw.org 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=()
B
Security Headers
7 of 10 headers properly configured
REVIEW
7 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured (consider adding preload)
Got: max-age=31536000; includeSubDomains
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: strict-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: object-src 'none'; base-uri 'none'; script-src 'nonce-MTn6mFDGmI5YiVZJUJVI8RRv9O…
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: Netlify

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

C
Content Security Policy
Action
5 of 10 CSP checks passed
REVIEW
5 of 10 CSP checks passed
Info::
Raw CSP policy
Got: object-src 'none'; base-uri 'none'; script-src 'nonce-MTn6mFDGmI5YiVZJUJVI8RRv9OhDgIJJ' 'strict-dynamic' 'self'; report-uri /.netlify/functions/__csp-violations
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 'unsafe-inline' in script source
Info::
No 'unsafe-eval' in script source
Info::
No wildcard in script source
Info::
object-src is set to 'none'
Got: object-src 'none'
Info::
base-uri is properly restricted
Got: base-uri 'none'
Warning::
frame-ancestors directive is missing
frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.
Expected: frame-ancestors 'self'
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 not set
This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.
Expected: upgrade-insecure-requests

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.

frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.

Expected: frame-ancestors 'self'
Why this matters

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

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.

This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.

Expected: upgrade-insecure-requests
Why this matters

Without upgrade-insecure-requests, any HTTP subresource link survives as a mixed-content warning instead of auto-upgrading.

Learn more

Adding `upgrade-insecure-requests` to your CSP turns every http:// subresource fetch into https:// at the browser layer. One-line defense against accidental mixed content from legacy links or third-party widgets.

Source: MDN CSP

Parsed Policy

object-src 'none'
base-uri 'none'
script-src 'nonce-MTn6mFDGmI5YiVZJUJVI8RRv9OhDgIJJ''strict-dynamic''self'
report-uri /.netlify/functions/__csp-violations
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
C
security.txt
Action
Expired (2025-12-31T22:59:00.000Z) — update Expires field
REVIEW

security.txt

Contact: mailto:responsibledisclosure@adyen.com
Expires: 2025-12-31T22:59:00.000Z
Encryption: https://www.adyen.com/.well-known/security-pgp-key.asc
Policy: https://www.adyen.com/.well-known/security.txt
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_AES_128_GCM_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 31 days)
Got: 2026-05-09T09:09:51Z
Info::
Certificate chain has 2 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA384
Info::
Certificate covers 67 domain(s)
Got: 1provider.com, adjen.nl, adyen.biz, adyen.blog, adyen.bz, adyen.ca, adyen.club, adyen.co.kr, adyen.co.nz, adyen.co.uk, adyen.com, adyen.com.au, adyen.com.co, adyen.com.mx, adyen.com.pe, adyen.com.sg, adyen.de, adyen.design, adyen.eu, adyen.fun, adyen.global, adyen.group, adyen.hk, adyen.info, adyen.kr, adyen.legal, adyen.life, adyen.live, adyen.mobi, adyen.name, adyen.net, adyen.network, adyen.nl, adyen.nz, adyen.org, adyen.pl, adyen.pro, adyen.se, adyen.services, adyen.solutions, adyen.uk, adyen.us, adyen.wiki, adyenconnect.com, adyenpay.com, adyenpay.nl, adyenpayments.nl, adyenshop.com, adyenstore.com, atjen.com, atjen.nl, atyen.com, atyen.nl, cardcosts.com, dualprovider.com, dualpsp.com, dualvendor.com, interchangecalculator.com, interchangeplusnow.com, techevent.adyen.com, whereverpeoplepay.co.uk, whereverpeoplepay.com, whereverpeoplepay.com.br, whereverpeoplepay.eu, whereverpeoplepay.nl, whereverpeoplepay.us, www.adyen.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_AES_128_GCM_SHA256
HTTP Version
HTTP/1.1

Certificate Chain

Leaf Certificate
Subject CN=www.adyen.comIssuer CN=E7,O=Let's Encrypt,C=USValid 2026-02-08T09:09:52Z → 2026-05-09T09:09:51ZExpires in 31 days SANs 1provider.com, adjen.nl, adyen.biz, adyen.blog, adyen.bz, adyen.ca, adyen.club, adyen.co.kr, adyen.co.nz, adyen.co.uk, adyen.com, adyen.com.au, adyen.com.co, adyen.com.mx, adyen.com.pe, adyen.com.sg, adyen.de, adyen.design, adyen.eu, adyen.fun, adyen.global, adyen.group, adyen.hk, adyen.info, adyen.kr, adyen.legal, adyen.life, adyen.live, adyen.mobi, adyen.name, adyen.net, adyen.network, adyen.nl, adyen.nz, adyen.org, adyen.pl, adyen.pro, adyen.se, adyen.services, adyen.solutions, adyen.uk, adyen.us, adyen.wiki, adyenconnect.com, adyenpay.com, adyenpay.nl, adyenpayments.nl, adyenshop.com, adyenstore.com, atjen.com, atjen.nl, atyen.com, atyen.nl, cardcosts.com, dualprovider.com, dualpsp.com, dualvendor.com, interchangecalculator.com, interchangeplusnow.com, techevent.adyen.com, whereverpeoplepay.co.uk, whereverpeoplepay.com, whereverpeoplepay.com.br, whereverpeoplepay.eu, whereverpeoplepay.nl, whereverpeoplepay.us, www.adyen.comSignature ECDSA-SHA384Serial 5d891872de12c9d07b78dcc0508d4b1dfb2
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 339 days Signature SHA256-RSASerial aa75f1e62b8f0a220966d38bbfd4baa1
A+
Cookie Security
No cookies set — no cookie security risks
PASS
No cookies set — no cookie security risks
Info::
No cookies set — no cookie security risks

No cookies detected — no cookie security risks to report.

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) not advertised
HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
Info::
HSTS enabled (includeSubDomains)
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.

Send Feedback