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https://quantamagazine.org

Security

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

SCORE

75

GRADE

C

FIX

3

REVIEW

3

PASS

7

INFO

0

Checks

13

7 PASS 3 REVIEW 3 FIX

F

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

F

Subresource Integrity

Action

0 of 25 external resources have SRI

FIX

0 of 25 external resources have SRI

External script from scripts.clarity.ms lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://scripts.clarity.ms/0.8.59/clarity.js

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-6SNESLGK16&cx=c&gtm=4e64k1h2

External script from www.clarity.ms lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.clarity.ms/tag/w4eo24j1xe?ref=gtm

External script from cdn-cookieyes.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://cdn-cookieyes.com/client_data/391b7abb1290e8e114fb4d75/script.js

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-KZGMXJ7

External script from cdn-cookieyes.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://cdn-cookieyes.com/client_data/391b7abb1290e8e114fb4d75/script.js

External script from cdn-cookieyes.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://cdn-cookieyes.com/client_data/391b7abb1290e8e114fb4d75/banner.js

External link from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-includes/css/dist/block-library/style.min.css?ver=6.6.2

External link from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/sf-privacy-consent/css/front.min.css?ver=6.6.2

External link from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/themes/quanta2024/frontend/css/fonts.css

External link from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/themes/quanta2024/frontend/dist/main.min.css?ver=1775583826

External link from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/quanta-favorites/assets/css/favorites.css?ver=2.3.4

External script from quanta-mag.disqus.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://quanta-mag.disqus.com/count.js

External script from quanta-mag.disqus.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: //quanta-mag.disqus.com/count-data.js?1=159206%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D159206&1=159749%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D159749&1=160174%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160174&1=160679%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160679&1=160842%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160842&1=160892%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160892&1=160931%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160931&1=160935%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D160935&1=161067%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D161067&1=161098%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D161098

External script from quanta-mag.disqus.com lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: //quanta-mag.disqus.com/count-data.js?1=161167%20https%3A%2F%2Fwww.quantamagazine.org%2F%3Fp%3D161167

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/disqus-comment-system/public/js/comment_count.js?ver=3.1.1

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/disqus-comment-system/public/js/comment_embed.js?ver=3.1.1

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/quanta-education-interactive/jquery.validate.min.js?ver=6.6.2

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/quanta-education-interactive/edin.js?ver=6.6.2

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/sf-privacy-consent/js/front.min.js?ver=2.0.0

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/themes/quanta2024/frontend/dist/main.min.js?ver=1775583826

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/themes/quanta2024/frontend/js/mathjax/MathJax.js

External script from www.quantamagazine.org lacks integrity attribute

Without SRI, if this CDN is compromised, attackers could inject malicious code.

Got: https://www.quantamagazine.org/wp-content/plugins/quanta-favorites/assets/js/favorites.min.js?ver=2.3.4

SRI Coverage 0 / 25 of external resources have integrity hashes

Tag	Domain	Integrity
<script>	scripts.clarity.ms	✗ Missing
<script>	www.googletagmanager.com	✗ Missing
<script>	www.clarity.ms	✗ Missing
<script>	cdn-cookieyes.com	✗ Missing
<script>	www.googletagmanager.com	✗ Missing
<script>	cdn-cookieyes.com	✗ Missing
<script>	cdn-cookieyes.com	✗ Missing
<link>	www.quantamagazine.org	✗ Missing
<link>	www.quantamagazine.org	✗ Missing
<link>	www.quantamagazine.org	✗ Missing
<link>	www.quantamagazine.org	✗ Missing
<link>	www.quantamagazine.org	✗ Missing
<script>	quanta-mag.disqus.com	✗ Missing
<script>	quanta-mag.disqus.com	✗ Missing
<script>	quanta-mag.disqus.com	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing
<script>	www.quantamagazine.org	✗ Missing

D

security.txt

Action

No /.well-known/security.txt published

FIX

security.txt

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

C

Security Headers

Action

6 of 10 headers properly configured

REVIEW

6 of 10 headers properly configured

HSTS is missing includeSubDomains

Without includeSubDomains, subdomains can still be accessed over HTTP.

Got: max-age=63072000; preload Expected: max-age=31536000; includeSubDomains

X-Content-Type-Options is properly configured

Got: nosniff

X-Frame-Options is properly configured

Got: SAMEORIGIN

Referrer-Policy is properly configured

Got: strict-origin-when-cross-origin

Permissions-Policy is set

Got: accelerometer=(), ambient-light-sensor=(), autoplay=(), battery=(), camera=(), cross-origin-isolated=(), display-capture=(), document-domain=(), encrypted-media=(), execution-while-not-rendered=(), execution-while-out-of-viewport=(), fullscreen=(), geolocation=(), gyroscope=(), keyboard-map=(), magnetometer=(), midi=(), navigation-override=(), payment=(), picture-in-picture=(), publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=(), usb=(), web-share=(), xr-spatial-tracking=()

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

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

Without includeSubDomains, subdomains can still be accessed over HTTP.

Expected: max-age=31536000; includeSubDomains

Why this matters

Without includeSubDomains, a forgotten dev subdomain over HTTP can set malicious cookies that ride to the apex.

Learn more ▾

HSTS without includeSubDomains protects only the exact domain. Cookies set on a non-HSTS subdomain can ride to the apex via cookie-scope attacks. The fix is one directive append. Verify all subdomains support HTTPS first — adding includeSubDomains to a domain with HTTP-only subdomains breaks them.

Source: RFC 6797

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

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

C

Known vulnerability matches

Action

2 known vulnerability match(es) against detected tech

REVIEW

Known Vulnerabilities

Library	Version	Severity	Summary	Fixed In
MathJax	2.7.0	medium	Macro in MathJax running untrusted Javascript within a web browser	2.7.4
MathJax	2.7.0	high	MathJax Regular expression Denial of Service (ReDoS)	2.7.10

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 67 days)

Got: 2026-06-29T14:31:37Z

Certificate chain has 2 certificates

Certificate uses modern signature algorithm

Got: SHA256-RSA

Certificate covers 2 domain(s)

Got: *.quantamagazine.org, quantamagazine.org

Certificate is issued by a trusted CA

Got: CN=R12,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_256_GCM_SHA384

HTTP Version

HTTP/1.1

Certificate Chain

Leaf Certificate

Subject CN=quantamagazine.orgIssuer CN=R12,O=Let's Encrypt,C=USValid 2026-03-31T14:31:38Z → 2026-06-29T14:31:37ZExpires in 67 days SANs *.quantamagazine.org, quantamagazine.orgSignature SHA256-RSASerial 5d182298512d3482ae0629a22aeaaf0bde9

Intermediate (CA Certificate)

Subject CN=R12,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 c212324b70a9b49171dc40f7e285263c

A+

Cookie Security

No cookies set — no cookie security risks

PASS

No cookies set — no cookie security risks

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

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	—

A+

Email Security

DMARC: reject

PASS

DMARC: reject

DMARC policy is reject — strongest protection

DMARC

Policy reject — strongest protection Record v=DMARC1; p=reject; pct=100; fo=1; rf=afrf; ri=3600; rua=mailto:cc0ca089@inbox.ondmarc.com; ruf=mailto:cc0ca089@inbox.ondmarc.com;

A+

Permissions-Policy

26 directives, 1 missing

PASS

26 directives, 1 missing

accelerometer=() — blocked for all origins

ambient-light-sensor=() — blocked for all origins

autoplay=() — blocked for all origins

battery=() — blocked for all origins

camera=() — blocked for all origins

cross-origin-isolated=() — blocked for all origins

display-capture=() — blocked for all origins

document-domain=() — blocked for all origins

encrypted-media=() — blocked for all origins

execution-while-not-rendered=() — blocked for all origins

execution-while-out-of-viewport=() — blocked for all origins

fullscreen=() — blocked for all origins

geolocation=() — blocked for all origins

gyroscope=() — blocked for all origins

keyboard-map=() — blocked for all origins

magnetometer=() — blocked for all origins

midi=() — blocked for all origins

navigation-override=() — blocked for all origins

payment=() — blocked for all origins

picture-in-picture=() — blocked for all origins

publickey-credentials-get=() — blocked for all origins

screen-wake-lock=() — blocked for all origins

sync-xhr=() — blocked for all origins

usb=() — blocked for all origins

web-share=() — blocked for all origins

xr-spatial-tracking=() — blocked for all origins

microphone not restricted

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

Raw Header

accelerometer=() ambient-light-sensor=() autoplay=() battery=() camera=() cross-origin-isolated=() display-capture=() document-domain=() encrypted-media=() execution-while-not-rendered=() execution-while-out-of-viewport=() fullscreen=() geolocation=() gyroscope=() keyboard-map=() magnetometer=() midi=() navigation-override=() payment=() picture-in-picture=() publickey-credentials-get=() screen-wake-lock=() sync-xhr=() usb=() web-share=() xr-spatial-tracking=()

Feature Permissions

Blocked Self Only Unrestricted Not Set

accelerometer Blocked

ambient-light-sensor Blocked

autoplay Blocked

battery Blocked

camera Blocked

cross-origin-isolated Blocked

display-capture Blocked

document-domain Blocked

encrypted-media Blocked

execution-while-not-rendered Blocked

execution-while-out-of-viewport Blocked

fullscreen Blocked

geolocation Blocked

gyroscope Blocked

keyboard-map Blocked

magnetometer Blocked

midi Blocked

navigation-override Blocked

payment Blocked

picture-in-picture Blocked

publickey-credentials-get Blocked

screen-wake-lock Blocked

sync-xhr Blocked

usb Blocked

web-share Blocked

xr-spatial-tracking Blocked

microphone Not Set

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 (preload)

HSTS missing includeSubDomains

Without includeSubDomains, HSTS only protects the exact domain.

HSTS preload enabled

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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