Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

5 PASS 3 REVIEW 4 FIX

Security Headers

Action

4 of 10 headers properly configured

FIX

4 of 10 headers properly configured

HSTS header is missing

Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year.

Expected: max-age=31536000; includeSubDomains

X-Content-Type-Options is properly configured

Got: nosniff

X-Frame-Options is properly configured

Got: DENY

Referrer-Policy has a weak value

Got: unsafe-url Expected: strict-origin-when-cross-origin

Permissions-Policy header is missing

Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.

Expected: geolocation=(), camera=(), microphone=()

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'

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 is not present

Server header is not present

Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year.

Expected: max-age=31536000; includeSubDomains

Why this matters

Without HSTS, a network attacker can downgrade the very first connection to HTTP and steal the user's session.

Learn more ▾

HSTS tells browsers 'never speak HTTP to this domain again.' Without it, a network attacker (public WiFi, malicious ISP, hostile DNS) intercepts the first HTTP attempt and serves a downgraded version of your site. One header, big surface reduction.

Source: RFC 6797 / OWASP

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

Expected: strict-origin-when-cross-origin

Why this matters

Weak Referrer-Policy values leak full URLs (with query params, tokens, IDs) to every third-party resource on the page.

Learn more ▾

Default referrer behavior shares the full referring URL with images, scripts, and other resources from third-party origins. If your URLs contain tokens, session IDs, or user emails (in query strings or paths), every third-party tracker gets them. Set `Referrer-Policy: strict-origin-when-cross-origin` (or stricter).

Source: MDN Referrer-Policy / 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

Content Security Policy

Action

No enforcing CSP policy found

FIX

No enforcing CSP policy found

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

Permissions-Policy

Action

No header set

FIX

No header set

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=()

security.txt

Action

No /.well-known/security.txt published

FIX

security.txt

No security.txt found at /.well-known/security.txt

Cookie Security

Action

3 cookies analyzed, 4 checks passed

REVIEW

3 cookies analyzed, 4 checks passed

Cookie '_csrf' has the Secure flag

Cookie '_csrf' has the HttpOnly flag

Cookie '_csrf' has no SameSite attribute

Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.

Cookie 'webu_session' is missing the Secure flag

Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.

Cookie 'webu_session' has the HttpOnly flag

Cookie 'webu_session' has no SameSite attribute

Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.

Cookie 'webu_session.sig' is missing the Secure flag

Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.

Cookie 'webu_session.sig' has the HttpOnly flag

Cookie 'webu_session.sig' has no SameSite attribute

Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.

3 cookies analyzed 2 critical 3 warnings

Name	Secure	HttpOnly	SameSite	Size	Issues
_csrf	✓	✓	—	29 B	1
webu_session	✗	✓	—	52 B	4
webu_session.sig	✗	✓	—	43 B	2

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

Transport Security

HTTP/3, HSTS, and TLS version analysis

REVIEW

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.

Missing Strict-Transport-Security header

HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks.

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

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_128_GCM_SHA256

HTTP/2 is not negotiated

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

Got: http/1.1

Certificate is valid (expires in 324 days)

Got: 2027-03-11T23:59:59Z

Certificate chain has 3 certificates

Certificate uses modern signature algorithm

Got: SHA256-RSA

Certificate covers 3 domain(s)

Got: *.flipboard.com, www.flipboard.com, flipboard.com

Certificate is issued by a trusted CA

Got: CN=Amazon RSA 2048 M01,O=Amazon,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=*.flipboard.comIssuer CN=Amazon RSA 2048 M01,O=Amazon,C=USValid 2026-02-11T00:00:00Z → 2027-03-11T23:59:59ZExpires in 324 days SANs *.flipboard.com, www.flipboard.com, flipboard.comSignature SHA256-RSASerial 504d9a1de5c7673655fb16c4daad94c

Intermediate (CA Certificate)

Subject CN=Amazon RSA 2048 M01,O=Amazon,C=USIssuer CN=Amazon Root CA 1,O=Amazon,C=USValid 2022-08-23T22:21:28Z → 2030-08-23T22:21:28ZExpires in 1585 days Signature SHA256-RSASerial 77312380b9d6688a33b1ed9bf9ccda68e0e0f

Intermediate (CA Certificate)

Subject CN=Amazon Root CA 1,O=Amazon,C=USIssuer CN=Starfield Services Root Certificate Authority - G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=USValid 2015-05-25T12:00:00Z → 2037-12-31T01:00:00ZExpires in 4271 days Signature SHA256-RSASerial 67f944a2a27cdf3fac2ae2b01f908eeb9c4c6

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

No security.txt found

Consider adding a security.txt at /.well-known/security.txt.

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	✓ Not found	Security Policy	—

Email Security

DMARC: quarantine

PASS

DMARC: quarantine

DMARC policy is quarantine — good protection

DMARC

Policy quarantine — good protection Record v=DMARC1; p=quarantine;

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.