Domain History

pass.hoerr.nl

Grade A+ · 100/100 · 6/7 security headers present

Security Score

A+

100/ 100

Security Headers

6/ 7

CSP Violations

NoViolations

Issues Found

5Issues

Recommendations

1Available

Security

100 / 100

Excellent security posture with strong CSP protections in place.

Compliance

90 / 100

CSP implementation follows recommended standards and specifications.

Best Practices

40 / 100

Few best practices adopted — significant room for improvement.

CSP Analysis

Content Security PolicyHIGH

default-src 'none'; font-src 'self'; manifest-src 'self'; base-uri 'self'; form-action 'self'; media-src 'self'; object-src 'self' blob:; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'; child-src 'self' https://*.duosecurity.com https://*.duofederal.com; frame-src 'self' https://*.duosecurity.com https://*.duofederal.com; frame-ancestors 'self' chrome-extension://nngceckbapebfimnlniiiahkandclblb chrome-extension://jbkfoedolllekgbhcbcoahefnbanhhlh moz-extension://* https://cloud.hoerr.nl https://cloud.eisele.cc; img-src 'self' data: https://haveibeenpwned.com ; connect-src 'self' https://api.pwnedpasswords.com https://api.2fa.directory https://app.simplelogin.io/api/ https://app.addy.io/api/ https://api.fastmail.com/ https://api.forwardemail.net ;

Directive Analysis

default-srcLOW

none

font-srcLOW

self

manifest-srcLOW

self

base-uriLOW

self

form-actionLOW

self

media-srcLOW

self

object-srcLOW

self blob:

•Info: 'blob:' URI in object-src

script-srcMEDIUM

self wasm-unsafe-eval

•No nonces or hashes used for script-src

style-srcHIGH

self unsafe-inline

•Unsafe inline execution allowed in style-src

child-srcLOW

self https://*.duosecurity.com https://*.duofederal.com

frame-srcLOW

self https://*.duosecurity.com https://*.duofederal.com

frame-ancestorsLOW

self chrome-extension://nngceckbapebfimnlniiiahkandclblb chrome-extension://jbkfoedolllekgbhcbcoahefnbanhhlh moz-extension://* https://cloud.hoerr.nl https://cloud.eisele.cc

img-srcLOW

self data: https://haveibeenpwned.com

•Info: 'data:' URI in img-src

connect-srcLOW

self https://api.pwnedpasswords.com https://api.2fa.directory https://app.simplelogin.io/api/ https://app.addy.io/api/ https://api.fastmail.com/ https://api.forwardemail.net

Security Headers

✗Cross-Origin-Opener-PolicyMissing

Isolates the browsing context to prevent Spectre-type side-channel attacks and cross-origin window manipulation.

How to add it:

nginx

add_header Cross-Origin-Opener-Policy "same-origin" always;

apache

Header always set Cross-Origin-Opener-Policy "same-origin"

cloudflare

Rules > Transform Rules > HTTP Response Header Modification > Set Cross-Origin-Opener-Policy to "same-origin"

✓Permissions-PolicyPresent

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

Restricts which browser features (camera, microphone, geolocation) the page can use, limiting attack surface.

✓Referrer-PolicyPresent

same-origin

Controls how much referrer information is sent with requests, preventing data leaks to third parties.

✓Strict-Transport-SecurityPresent

max-age=31536000;

Forces browsers to use HTTPS for all future requests, preventing man-in-the-middle attacks and SSL stripping.

✓X-Content-Type-OptionsPresent

nosniff

Prevents browsers from MIME-sniffing responses away from the declared Content-Type, blocking drive-by downloads.

✓X-Frame-OptionsPresent

SAMEORIGIN

Prevents the page from being embedded in iframes, protecting against clickjacking attacks.

✓X-XSS-ProtectionPresent

Legacy XSS filter for older browsers. Modern browsers use CSP instead. Set to "0" to avoid false positives.

1 recommended security header is missing on pass.hoerr.nl.

Issues Found

•Info: 'blob:' URI in object-srcinfo
•Info: 'data:' URI in img-srcinfo
•Missing security header: Cross-Origin-Opener-Policymedium
•No nonces or hashes used for script-srcmedium
•Unsafe inline execution allowed in style-srchigh

Recommendations

→Consider implementing a stricter Content Security Policy

Beyond headers: infrastructure exposure

via OSN, our sister project

Security headers protect the browser. OSN maps what's exposed underneath — servers, open ports, known CVEs, DNS and WHOIS.

See what the internet sees about pass.hoerr.nl

See full exposure report on OSN →Free, no signup.

pass.hoerr.nl

1 scan since 5/21/2026

A+

Latest: 100/100

Total Scans

Latest Score

100/100

First Scan

5/21/2026

Last Scan

5/21/2026

Security

100 / 100

Excellent security posture with strong CSP protections in place.

Compliance

90 / 100

CSP implementation follows recommended standards and specifications.

Best Practices

40 / 100

Few best practices adopted — significant room for improvement.

Scan History

Date	Score	CSP	Headers	Issues	Action
May 21, 2026	A+ (100)	Yes	6/7	5	View →

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HeaderTest security grade: A+ (100/100) for pass.hoerr.nl

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