Security - https://matheo-olsen.fr BeaverCheck Audit

D

security.txt

Action

No /.well-known/security.txt published

FIX

security.txt

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

B

Permissions-Policy

3 directives, 2 missing

REVIEW

3 directives, 2 missing

camera=() — blocked for all origins

microphone=() — blocked for all origins

geolocation=() — blocked for all origins

payment not restricted

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

usb not restricted

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

Raw Header

camera=() microphone=() geolocation=()

Feature Permissions

Blocked Self Only Unrestricted Not Set

camera Blocked

microphone Blocked

geolocation Blocked

payment Not Set

usb Not Set

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

A

Security Headers

8 of 10 headers properly configured

PASS

8 of 10 headers properly configured

Strict-Transport-Security is properly configured

Got: max-age=63072000; includeSubDomains; preload

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: camera=(), microphone=(), geolocation=()

Content-Security-Policy is present

Got: default-src 'self'; script-src 'self' 'nonce-MGFlZGI0MjAtYTY4MC00NWVkLTg0OWQtYjJ…

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

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+

Content Security Policy

9 of 10 CSP checks passed

PASS

9 of 10 CSP checks passed

Raw CSP policy

Got: default-src 'self'; script-src 'self' 'nonce-MGFlZGI0MjAtYTY4MC00NWVkLTg0OWQtYjJhNmI1MDRjZjEz' 'strict-dynamic' ; style-src 'self' 'unsafe-inline'; img-src 'self' blob: data: *.matheo-olsen.fr; font-src 'self'; connect-src 'self' analytics.matheo-olsen.fr; media-src 'self' *.matheo-olsen.fr; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none'; upgrade-insecure-requests;

default-src directive is set

Got: default-src 'self'

No 'unsafe-inline' in script source

No 'unsafe-eval' in script source

No wildcard in script source

object-src is set to 'none'

Got: object-src 'none'

base-uri is properly restricted

Got: base-uri 'self'

frame-ancestors directive is set

Got: frame-ancestors 'none'

form-action directive is set

Got: form-action 'self'

upgrade-insecure-requests is enabled

Parsed Policy

default-src 'self'

script-src 'self''nonce-MGFlZGI0MjAtYTY4MC00NWVkLTg0OWQtYjJhNmI1MDRjZjEz''strict-dynamic'

style-src 'self''unsafe-inline'

img-src 'self'blob:data:*.matheo-olsen.fr

font-src 'self'

connect-src 'self'analytics.matheo-olsen.fr

media-src 'self'*.matheo-olsen.fr

object-src 'none'

base-uri 'self'

form-action 'self'

frame-ancestors 'none'

upgrade-insecure-requests

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_CHACHA20_POLY1305_SHA256

HTTP/2 is not negotiated

HTTP/2 provides multiplexing and header compression for better performance.

Got: http/1.1

Certificate is valid (expires in 84 days)

Got: 2026-07-02T09:47:07Z

Certificate chain has 2 certificates

Certificate uses modern signature algorithm

Got: SHA256-RSA

Certificate covers 1 domain(s)

Got: matheo-olsen.fr

Certificate is issued by a trusted CA

Got: CN=R13,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_CHACHA20_POLY1305_SHA256

HTTP Version

HTTP/1.1

Certificate Chain

Leaf Certificate

Subject CN=matheo-olsen.frIssuer CN=R13,O=Let's Encrypt,C=USValid 2026-04-03T09:47:08Z → 2026-07-02T09:47:07ZExpires in 84 days SANs matheo-olsen.frSignature SHA256-RSASerial 6ee9da2d0c83c22daccaa1044351356843d

Intermediate (CA Certificate)

Subject CN=R13,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 338 days Signature SHA256-RSASerial 5a00f212d8d4b480f3924157ea298305

A+

Cookie Security

No cookies set — no cookie security risks

PASS

No cookies set — no cookie security risks

No cookies detected — no cookie security risks to report.

A+

Subresource Integrity

No external resources

PASS

No external resources

No external resources to protect

SRI Coverage No external resources — SRI not applicable

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: quarantine

PASS

DMARC: quarantine

DMARC policy is quarantine — good protection

DMARC

Policy quarantine — good protection Record v=DMARC1; p=quarantine;

A+

Transport Security

HTTP/3, HSTS, and TLS version analysis

PASS

HTTP/3, HSTS, and TLS version analysis

HTTP/3 (QUIC) supported

The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks.

HSTS enabled (includeSubDomains, preload)

HSTS preload enabled

TLS 1.3 in use (fastest handshake, 1-RTT)