Security - https://www.bl.uk BeaverCheck Audit

F

Email Security

Action

No DMARC

FIX

No DMARC

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

B

Security Headers

6 of 10 headers properly configured

REVIEW

6 of 10 headers properly configured

Strict-Transport-Security is properly configured

Got: max-age=63072000; includeSubDomains; preload

X-Content-Type-Options is properly configured

Got: nosniff

X-Frame-Options has unexpected value

Got: ALLOW-FROM https://sanitycms.bl.uk Expected: DENY or SAMEORIGIN

Referrer-Policy is properly configured

Got: strict-origin-when-cross-origin

Permissions-Policy is set

Got: fullscreen=(self), autoplay=(self)

Content-Security-Policy is present

Got: frame-ancestors 'self' https://sanitycms.bl.uk

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

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

X-Powered-By header reveals technology stack

This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.

Got: Next.js

Server header is not present

Expected: DENY or SAMEORIGIN

Why this matters

An unrecognized X-Frame-Options value falls back to browser default behavior — clickjacking protection silently disabled.

Learn more ▾

X-Frame-Options accepts only DENY, SAMEORIGIN, or ALLOW-FROM (deprecated). Anything else (including typos like SAMEORIGN, or modern CSP-style frame-ancestors values shoved in by mistake) is ignored. The header LOOKS protective but isn't. Use `X-Frame-Options: DENY` plus `Content-Security-Policy: frame-ancestors 'none'` for defense in depth.

Source: MDN X-Frame-Options

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

This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.

Why this matters

X-Powered-By: PHP/7.4.3 advertises your stack to attackers — disable it.

Learn more ▾

X-Powered-By and similar headers (X-AspNet-Version, X-Runtime) tell attackers which versions to target. Disable in your server/framework config: PHP `expose_php=Off`, ASP.NET `<httpRuntime enableVersionHeader="false">`, Express `app.disable('x-powered-by')`.

Source: OWASP

B

Content Security Policy

2 of 10 CSP checks passed

REVIEW

2 of 10 CSP checks passed

Raw CSP policy

Got: frame-ancestors 'self' https://sanitycms.bl.uk

default-src directive is missing

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

Expected: default-src 'self'

No script-src or default-src to check for 'unsafe-inline'

No script-src or default-src to check for 'unsafe-eval'

No script-src or default-src to check for wildcard

object-src falls back to default-src

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'

frame-ancestors directive is set

Got: frame-ancestors 'self' https://sanitycms.bl.uk

form-action directive is missing

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

Expected: form-action 'self'

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.

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.

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

frame-ancestors 'self'https://sanitycms.bl.uk

C

Permissions-Policy

Action

2 directives, 5 missing

REVIEW

2 directives, 5 missing

fullscreen=(self)

autoplay=(self)

camera not restricted

Consider adding camera=() to block camera access from embedded content.

microphone not restricted

Consider adding microphone=() to block microphone access from embedded content.

geolocation not restricted

Consider adding geolocation=() to block geolocation access from embedded content.

payment not restricted

Consider adding payment=() to block payment access from embedded content.

usb not restricted

Consider adding usb=() to block usb access from embedded content.

Raw Header

fullscreen=(self) autoplay=(self)

Feature Permissions

Blocked Self Only Unrestricted Not Set

fullscreen Self Only

autoplay Self Only

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

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://hackerone.com/4faee172-90ab-4690-8e26-104ba0e64fcb/embedded_submissions/new

Expires: 2026-12-31T00:01:00.000Z

Policy: https://www.bl.uk/.well-known/security.txt

A+

TLS & Certificates

TLS 1.3, 7 checks passed

PASS

TLS 1.3, 7 checks passed

TLS 1.3 is used

Got: TLS 1.3

Strong cipher suite is used

Got: TLS_AES_256_GCM_SHA384

HTTP/2 is not negotiated

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

Got: http/1.1

Certificate is valid (expires in 89 days)

Got: 2026-07-19T23:59:59Z

Certificate chain has 3 certificates

Certificate uses modern signature algorithm

Got: SHA256-RSA

Certificate covers 1 domain(s)

Got: www.bl.uk

Certificate is issued by a trusted CA

Got: CN=GeoTrust TLS RSA CA G1,OU=www.digicert.com,O=DigiCert Inc,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_256_GCM_SHA384

HTTP Version

HTTP/1.1

Certificate Chain

Leaf Certificate

Subject CN=www.bl.ukIssuer CN=GeoTrust TLS RSA CA G1,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2026-01-19T00:00:00Z → 2026-07-19T23:59:59ZExpires in 89 days SANs www.bl.ukSignature SHA256-RSASerial c39741080fec8b12b9fdff986ac10d0

Intermediate (CA Certificate)

Subject CN=GeoTrust TLS RSA CA G1,OU=www.digicert.com,O=DigiCert Inc,C=USIssuer CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2017-11-02T12:23:37Z → 2027-11-02T12:23:37ZExpires in 559 days Signature SHA256-RSASerial d07782a133fc6f9a57296e131ffd179

Intermediate (CA Certificate)

Subject CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USIssuer CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2013-08-01T12:00:00Z → 2038-01-15T12:00:00ZExpires in 4286 days Signature SHA256-RSASerial 33af1e6a711a9a0bb2864b11d09fae5

A+

Cookie Security

No cookies set — no cookie security risks

PASS

No cookies set — no cookie security risks

No cookies detected — no cookie security risks to report.

A+

Subresource Integrity

No external resources

PASS

No external resources

No external resources to protect

SRI Coverage No external resources — SRI not applicable

A+

JS Library Vulnerabilities

No known vulnerabilities

PASS

No known vulnerabilities

No known JavaScript library vulnerabilities detected

No known JavaScript library vulnerabilities detected.

A+

Information Leakage

No exposures

PASS

No exposures

security.txt is present — good practice

No sensitive files exposed

No sensitive files exposed — all paths returned 404.

Path	Status	Category	Risk
/.git/HEAD	✓ Not found	Version Control	—
/.git/config	✓ Not found	Version Control	—
/.svn/entries	✓ Not found	Version Control	—
/.env	✓ Not found	Configuration	—
/.env.local	✓ Not found	Configuration	—
/.env.production	✓ Not found	Configuration	—
/wp-config.php	✓ Not found	Configuration	—
/.htaccess	✓ Not found	Configuration	—
/phpinfo.php	✓ Not found	Debug	—
/server-status	✓ Not found	Debug	—
/server-info	✓ Not found	Debug	—
/.well-known/security.txt	✗ Exposed	Security Policy	Info

A

Transport Security

HTTP/3, HSTS, and TLS version analysis

PASS

HTTP/3, HSTS, and TLS version analysis

HTTP/3 (QUIC) not advertised

HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.

HSTS enabled (includeSubDomains, preload)

HSTS preload enabled

TLS 1.3 in use (fastest handshake, 1-RTT)