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huk.de

Grade F · 39/100 · 2/7 security headers present

Security Score

F
39/ 100

Security Headers

2/ 7

CSP Violations

NoViolations

Issues Found

13Issues

Recommendations

9Available

Security

39 / 100

Significant security weaknesses detected in CSP configuration.

Compliance

34 / 100

Major compliance issues — missing critical directives and headers.

Best Practices

20 / 100

Best practices largely absent — review CSP configuration.

CSP Analysis

Content Security PolicyLOW
frame-ancestors 'self';
Directive Analysis
frame-ancestorsLOW
self
Missing Directives
⚠CRITICALMissing CRITICAL directive default-src (Base fallback directive)
⚠CRITICALMissing CRITICAL directive script-src (JavaScript source control)
⚠HIGHMissing HIGH directive object-src (Plugin control - should be 'none')
⚠HIGHMissing HIGH directive base-uri (Base URI control - prevents base tag injection)
⚠MEDIUMMissing MEDIUM directive form-action (Form submission control - prevents form hijacking)
⚠MEDIUMMissing MEDIUM directive connect-src (API/XHR control - prevents data exfiltration)
⚠MEDIUMMissing MEDIUM directive style-src (Stylesheet source control)
⚠MEDIUMMissing MEDIUM directive img-src (Image source control)
⚠MEDIUMMissing MEDIUM directive font-src (Font source control)

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-PolicyMissing

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

How to add it:

nginx
add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
apache
Header always set Permissions-Policy "camera=(), microphone=(), geolocation=()"
cloudflare
Rules > Transform Rules > HTTP Response Header Modification > Set Permissions-Policy value
✗Referrer-PolicyMissing

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

How to add it:

nginx
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
apache
Header always set Referrer-Policy "strict-origin-when-cross-origin"
cloudflare
Rules > Transform Rules > HTTP Response Header Modification > Set Referrer-Policy to "strict-origin-when-cross-origin"
✓Strict-Transport-SecurityPresent

max-age=16070400; includeSubDomains

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

✗X-Content-Type-OptionsMissing

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

How to add it:

nginx
add_header X-Content-Type-Options "nosniff" always;
apache
Header always set X-Content-Type-Options "nosniff"
cloudflare
Rules > Transform Rules > Managed Transforms > Enable "Add X-Content-Type-Options header"
✓X-Frame-OptionsPresent

SAMEORIGIN

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

—X-XSS-ProtectionDeprecated

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

4 recommended security headers are missing on huk.de.

Issues Found

  • •Missing CRITICAL directive default-src (Base fallback directive)critical
  • •Missing CRITICAL directive script-src (JavaScript source control)critical
  • •Missing HIGH directive base-uri (Base URI control - prevents base tag injection)high
  • •Missing HIGH directive object-src (Plugin control - should be 'none')high
  • •Missing MEDIUM directive connect-src (API/XHR control - prevents data exfiltration)medium
  • •Missing MEDIUM directive font-src (Font source control)medium
  • •Missing MEDIUM directive form-action (Form submission control - prevents form hijacking)medium
  • •Missing MEDIUM directive img-src (Image source control)medium
  • •Missing MEDIUM directive style-src (Stylesheet source control)medium
  • •Missing security header: Cross-Origin-Opener-Policymedium
  • •Missing security header: Permissions-Policymedium
  • •Missing security header: Referrer-Policymedium
  • •Missing security header: X-Content-Type-Optionsmedium

Recommendations

  • →Add base-uri directive with appropriate restrictions
  • →Add connect-src directive with appropriate restrictions
  • →Add default-src directive with appropriate restrictions
  • →Add font-src directive with appropriate restrictions
  • →Add form-action directive with appropriate restrictions
  • →Add img-src directive with appropriate restrictions
  • →Add object-src directive with appropriate restrictions
  • →Add script-src directive with appropriate restrictions
  • →Add style-src directive with appropriate restrictions

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 huk.deWeak headers often come with other exposure — check the full picture.
See full exposure report on OSN →Free, no signup.

huk.de

10 scans since 7/13/2026

F

Latest: 39/100

Total Scans

10

Latest Score

39/100

First Scan

7/13/2026

Last Scan

9/29/2026

Security

39 / 100

Significant security weaknesses detected in CSP configuration.

Compliance

34 / 100

Major compliance issues — missing critical directives and headers.

Best Practices

20 / 100

Best practices largely absent — review CSP configuration.

Score Trend

Security score progression over 10 scans

Scan History

DateScoreCSPHeadersIssuesAction
Sep 29, 2026
F (39)
Yes
2/713View →
Aug 10, 2026
F (39)
Yes
2/713View →
Aug 10, 2026
F (39)
Yes
2/713View →
Jul 31, 2026
F (39)
Yes
2/713View →
Jul 30, 2026
F (39)
Yes
2/713View →
Jul 23, 2026
F (39)
Yes
2/713View →
Jul 22, 2026
F (39)
Yes
2/713View →
Jul 22, 2026
F (39)
Yes
2/713View →
Jul 15, 2026
F (39)
Yes
2/713View →
Jul 13, 2026
F (39)
Yes
2/713View →

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HeaderTest security grade: F (39/100) for huk.de
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