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Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
1
PASS
7
INFO
0
Checks
12
7 PASS 1 REVIEW 4 FIX
D
Content Security Policy
Action
5 of 10 CSP checks passed
FIX
5 of 10 CSP checks passed
Info::
Raw CSP policy
Got: default-src 'none'; connect-src 'self' https://medlineplus.gov www.google-analytics.com stats.g.doubleclick.net *.crazyegg.com *.qualtrics.com; font-src 'self' data: https://medlineplus.gov ; media-src 'self' https://medlineplus.gov ; worker-src 'self' blob: https://medlineplus.gov ; frame-src https://medlineplus.gov www.googletagmanager.com https://platform.twitter.com:443 https://syndication.twitter.com:443; frame-ancestors 'self' https://guides.nnlm.gov https://medlineplus.gov; img-src 'self' data: https://medlineplus.gov https://accreditnet.urac.org https://www.urac.org https://content.govdelivery.com https://ssl.adam.com/ www.google-analytics.com www.googletagmanager.com gtrk.s3.amazonaws.com stats.g.doubleclick.net https://syndication.twitter.com:443 https://platform.twitter.com:443 *.twimg.com *.qualtrics.com data:; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://medlineplus.gov https://content.govdelivery.com https://platform.twitter.com:443 syndication.twitter.com https://dap.digitalgov.gov *.crazyegg.com www.google-analytics.com www.googletagmanager.com *.cloudfront.net *.nlm.nih.gov ajax.googleapis.com cdn.syndication.twimg.com *.qualtrics.com; style-src 'self' 'unsafe-inline' https://medlineplus.gov https://content.govdelivery.com https://platform.twitter.com:443; object-src 'none'; upgrade-insecure-requests; report-uri https://nlmoccs.report-uri.com/r/d/csp/reportOnly;
Info::
default-src directive is set
Got: default-src 'none'
Critical::
'unsafe-inline' found in script source
'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.
Got: script-src 'self' 'unsafe-inline' 'unsafe-eval' https://medlineplus.gov https://content.govdelivery.com https://platform.twitter.com:443 syndication.twitter.com https://dap.digitalgov.gov *.crazyegg.com www.google-analytics.com www.googletagmanager.com *.cloudfront.net *.nlm.nih.gov ajax.googleapis.com cdn.syndication.twimg.com *.qualtrics.com
Critical::
'unsafe-eval' found in script source
'unsafe-eval' allows eval() and similar functions, enabling code injection. Remove it.
Got: script-src 'self' 'unsafe-inline' 'unsafe-eval' https://medlineplus.gov https://content.govdelivery.com https://platform.twitter.com:443 syndication.twitter.com https://dap.digitalgov.gov *.crazyegg.com www.google-analytics.com www.googletagmanager.com *.cloudfront.net *.nlm.nih.gov ajax.googleapis.com cdn.syndication.twimg.com *.qualtrics.com
Info::
No wildcard in script source
Info::
object-src is set to 'none'
Got: object-src 'none'
Warning::
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'
Info::
frame-ancestors directive is set
Got: frame-ancestors 'self' https://guides.nnlm.gov https://medlineplus.gov
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 enabled

'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.

Why this matters

Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.

Learn more ▾

unsafe-inline allows inline <script> tags; unsafe-eval allows eval() and similar. Both are necessary for some legacy code but explicitly dangerous. Migrate to nonces (per-page random tokens) or hashes (per-script SHA-256) instead.

Source: OWASP CSP / MDN

'unsafe-eval' allows eval() and similar functions, enabling code injection. Remove it.

Why this matters

Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.

Learn more ▾

unsafe-inline allows inline <script> tags; unsafe-eval allows eval() and similar. Both are necessary for some legacy code but explicitly dangerous. Migrate to nonces (per-page random tokens) or hashes (per-script SHA-256) instead.

Source: OWASP CSP / MDN

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.

Parsed Policy

default-src 'none'
connect-src 'self'https://medlineplus.govwww.google-analytics.comstats.g.doubleclick.net*.crazyegg.com*.qualtrics.com
font-src 'self'data:https://medlineplus.gov
media-src 'self'https://medlineplus.gov
worker-src 'self'blob:https://medlineplus.gov
frame-src https://medlineplus.govwww.googletagmanager.comhttps://platform.twitter.com:443https://syndication.twitter.com:443
frame-ancestors 'self'https://guides.nnlm.govhttps://medlineplus.gov
img-src 'self'data:https://medlineplus.govhttps://accreditnet.urac.orghttps://www.urac.orghttps://content.govdelivery.comhttps://ssl.adam.com/www.google-analytics.comwww.googletagmanager.comgtrk.s3.amazonaws.comstats.g.doubleclick.nethttps://syndication.twitter.com:443https://platform.twitter.com:443*.twimg.com*.qualtrics.comdata:
script-src 'self''unsafe-inline''unsafe-eval'https://medlineplus.govhttps://content.govdelivery.comhttps://platform.twitter.com:443syndication.twitter.comhttps://dap.digitalgov.gov*.crazyegg.comwww.google-analytics.comwww.googletagmanager.com*.cloudfront.net*.nlm.nih.govajax.googleapis.comcdn.syndication.twimg.com*.qualtrics.com
style-src 'self''unsafe-inline'https://medlineplus.govhttps://content.govdelivery.comhttps://platform.twitter.com:443
object-src 'none'
upgrade-insecure-requests
report-uri https://nlmoccs.report-uri.com/r/d/csp/reportOnly
F
Subresource Integrity
Action
0 of 11 external resources have SRI
FIX
0 of 11 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/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1h1
Warning::
External script from www.google-analytics.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.google-analytics.com/plugins/ua/linkid.js
Warning::
External script from www.google-analytics.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.google-analytics.com/analytics.js
Warning::
External script from script.crazyegg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://script.crazyegg.com/pages/scripts/0027/2050.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-P1FPTH9PL4&cx=c&gtm=4e64h1h1
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-7147EPK006&cx=c&gtm=4e64h1h1
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-MMVM77
Warning::
External script from dap.digitalgov.gov lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.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-CSLL4ZEK4L
Warning::
External script from dap.digitalgov.gov lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=HHS&subagency=NIH&sp=query&enhlink=true
Warning::
External script from zn0mtvfxokez0eitv-nlmenterprise.siteintercept.qualtrics.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://zn0mtvfxokez0eitv-nlmenterprise.siteintercept.qualtrics.com/WRSiteInterceptEngine/?Q_ZID=ZN_0MtvfxoKez0EItv&Q_LOC=https%3A%2F%2Fmedlineplus.gov%2F&t=1776799524721
SRI Coverage 0 / 11 of external resources have integrity hashes
TagDomainIntegrity
<script>www.googletagmanager.com✗ Missing
<script>www.google-analytics.com✗ Missing
<script>www.google-analytics.com✗ Missing
<script>script.crazyegg.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>dap.digitalgov.gov✗ Missing
<script>www.googletagmanager.com✗ Missing
<script>dap.digitalgov.gov✗ Missing
<script>zn0mtvfxokez0eitv-nlmenterprise.siteintercept.qualtrics.com✗ Missing
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=()
D
security.txt
Action
No /.well-known/security.txt published
FIX

security.txt

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

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= 63072000; 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: strict-origin-when-cross-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: default-src 'none'; connect-src 'self' https://medlineplus.gov www.google-analy…
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: AmazonS3

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

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 284 days)
Got: 2027-01-30T23:59:59Z
Info::
Certificate chain has 3 certificates
Info::
Certificate uses modern signature algorithm
Got: SHA256-RSA
Info::
Certificate covers 10 domain(s)
Got: medlineplus.gov, medlineplus.com, medlineplus.awsprod.nlm.nih.gov, medlineplus.net, www.medlineplus.org, www.medlineplus.com, www.medlineplus.gov, www.medlineplus.net, medlineplus.nlm.nih.gov, medlineplus.org
Info::
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=medlineplus.govIssuer CN=Amazon RSA 2048 M01,O=Amazon,C=USValid 2026-01-02T00:00:00Z → 2027-01-30T23:59:59ZExpires in 284 days SANs medlineplus.gov, medlineplus.com, medlineplus.awsprod.nlm.nih.gov, medlineplus.net, www.medlineplus.org, www.medlineplus.com, www.medlineplus.gov, www.medlineplus.net, medlineplus.nlm.nih.gov, medlineplus.orgSignature SHA256-RSASerial 2d09d7c80519b74b4d68cf9c5ad8316
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+
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::
No security.txt found
Consider adding a security.txt at /.well-known/security.txt.
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✓ Not foundSecurity Policy—
A+
Email Security
DMARC: reject
PASS
DMARC: reject
Info::
DMARC policy is reject — strongest protection
DMARC
Policy reject — strongest protection Record v=DMARC1; p=reject; rua=mailto:8idhoybh@ag.us.dmarcian.com,mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:8idhoybh@fr.us.dmarcian.com; fo=1;
A
CORS Configuration
Origin: *.nlm.nih.gov
PASS
Origin: *.nlm.nih.gov
Info::
CORS restricted to specific origin(s)
Got: *.nlm.nih.gov
Info::
Origin reflection not testable with a single request
Some servers reflect the request Origin header. This requires manual testing with a crafted Origin header.
CORS Configuration ✓ Well Configured
Allow-Origin *.nlm.nih.gov
HeaderValueStatus
Access-Control-Allow-Origin*.nlm.nih.gov✓

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
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, 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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