Domain History

www.slbenfica.pt

Grade F · 18/100 · 5/7 security headers present

Security Score

18/ 100

Security Headers

5/ 7

CSP Violations

NoViolations

Issues Found

18Issues

Recommendations

5Available

Security

18 / 100

Critical security vulnerabilities — CSP provides minimal protection.

Compliance

84 / 100

Mostly compliant but some directives or headers are missing.

Best Practices

30 / 100

Few best practices adopted — significant room for improvement.

CSP Analysis

Content Security PolicyHIGH

default-src * data: blob:; script-src 'unsafe-inline' 'unsafe-eval' * data: blob:; style-src 'unsafe-inline' * data: blob:; frame-ancestors 'self'; object-src 'self'; base-uri 'self'; form-action 'self' https://mybenfica.slbenfica.pt;

Directive Analysis

default-srcHIGH

* data: blob:

•CRITICAL: Bare wildcard (*) in default-src allows ANY source

•CRITICAL: 'data:' URI in default-src allows arbitrary JavaScript execution

•HIGH RISK: 'blob:' URI in default-src allows script execution from dynamic blobs

•Overly permissive default-src directive

script-srcHIGH

unsafe-inline unsafe-eval * data: blob:

•Unsafe inline execution allowed in script-src

•Unsafe eval() execution allowed in script-src

•CRITICAL: Bare wildcard (*) in script-src allows ANY source

•CRITICAL: 'data:' URI in script-src allows arbitrary JavaScript execution

•HIGH RISK: 'blob:' URI in script-src allows script execution from dynamic blobs

•No nonces or hashes used for script-src

style-srcHIGH

unsafe-inline * data: blob:

•Unsafe inline execution allowed in style-src

•CRITICAL: Bare wildcard (*) in style-src allows ANY source

•Info: 'data:' URI in style-src

•Info: 'blob:' URI in style-src

frame-ancestorsLOW

self

object-srcLOW

self

base-uriLOW

self

form-actionLOW

self https://mybenfica.slbenfica.pt

Missing Directives

⚠MEDIUMMissing MEDIUM directive connect-src (API/XHR control - prevents data exfiltration)

⚠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-PolicyPresent

microphone=(), camera=()

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

✓Referrer-PolicyPresent

strict-origin-when-cross-origin

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

✓Strict-Transport-SecurityPresent

max-age=63072000; includeSubDomains; preload

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-ProtectionDeprecated

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 www.slbenfica.pt.

Issues Found

•CRITICAL: 'data:' URI in default-src allows arbitrary JavaScript executioncritical
•CRITICAL: 'data:' URI in script-src allows arbitrary JavaScript executioncritical
•CRITICAL: Bare wildcard (*) in default-src allows ANY sourcecritical
•CRITICAL: Bare wildcard (*) in script-src allows ANY sourcecritical
•CRITICAL: Bare wildcard (*) in style-src allows ANY sourcecritical
•HIGH RISK: 'blob:' URI in default-src allows script execution from dynamic blobshigh
•HIGH RISK: 'blob:' URI in script-src allows script execution from dynamic blobshigh
•Info: 'blob:' URI in style-srcinfo
•Info: 'data:' URI in style-srcinfo
•Missing MEDIUM directive connect-src (API/XHR control - prevents data exfiltration)medium
•Missing MEDIUM directive font-src (Font source control)medium
•Missing MEDIUM directive img-src (Image source control)medium
•Missing security header: Cross-Origin-Opener-Policymedium
•No nonces or hashes used for script-srcmedium
•Overly permissive default-src directivehigh
•Unsafe eval() execution allowed in script-srchigh
•Unsafe inline execution allowed in script-srchigh
•Unsafe inline execution allowed in style-srchigh

Recommendations

→Add connect-src directive with appropriate restrictions
→Add font-src directive with appropriate restrictions
→Add img-src directive with appropriate restrictions
→Consider implementing a stricter Content Security Policy
→Replace wildcards (*) with specific source lists

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 www.slbenfica.ptWeak headers often come with other exposure — check the full picture.

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

www.slbenfica.pt

1 scan since 5/28/2026

Latest: 18/100

Total Scans

Latest Score

18/100

First Scan

5/28/2026

Last Scan

5/28/2026

Security

18 / 100

Critical security vulnerabilities — CSP provides minimal protection.

Compliance

84 / 100

Mostly compliant but some directives or headers are missing.

Best Practices

30 / 100

Few best practices adopted — significant room for improvement.

Scan History

Date	Score	CSP	Headers	Issues	Action
May 28, 2026	F (18)	Yes	5/7	18	View →

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HeaderTest security grade: F (18/100) for www.slbenfica.pt

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