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https://gyazo.com

Security

· 13 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
66
GRADE
D
FIX
4
REVIEW
4
PASS
5
INFO
0
Checks
13
5 PASS 4 REVIEW 4 FIX
F
Content Security Policy
Action
No enforcing CSP policy found
FIX
No enforcing CSP policy found
Critical::
No Content-Security-Policy header found
CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.
Expected: default-src 'self'

CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

Expected: default-src 'self'
Why this matters

Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.

Learn more

Content-Security-Policy is the browser-enforced firewall against XSS. With a strict CSP, a script injection that would otherwise steal session cookies is silently blocked. Without it, your only defense is hoping every input on every form is escaped correctly forever. Start in Report-Only mode, fix violations, then graduate to enforcing.

Source: OWASP / MDN

F
Subresource Integrity
Action
0 of 13 external resources have SRI
FIX
0 of 13 external resources have SRI
Warning::
External link from assets2.gyazo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //assets2.gyazo.com/dist/landing-809d6db1a7.css
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/destination?id=G-5MHJHQDVHJ&cx=c&gtm=4e64k1
Warning::
External script from scripts.clarity.ms lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://scripts.clarity.ms/0.8.59/clarity.js
Warning::
External script from www.clarity.ms lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://www.clarity.ms/tag/k99qao83oh
Warning::
External script from static.ads-twitter.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //static.ads-twitter.com/uwt.js
Warning::
External script from snap.licdn.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://snap.licdn.com/li.lms-analytics/insight.min.js
Warning::
External script from connect.facebook.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://connect.facebook.net/signals/config/281714859343322?v=2.9.303&r=stable&domain=gyazo.com&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168
Warning::
External script from connect.facebook.net lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://connect.facebook.net/en_US/fbevents.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: //www.google-analytics.com/analytics.js
Warning::
External script from cdn.mxpnl.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //cdn.mxpnl.com/libs/mixpanel-2-latest.min.js
Warning::
External script from assets2.gyazo.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //assets2.gyazo.com/dist/landing.5c705a8b558a0f3e4afe.js
Warning::
External link from fonts.googleapis.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&family=Open+Sans:wght@400;500;600;700&family=Poppins:wght@300;400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap
Warning::
External script from www.googletagmanager.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: //www.googletagmanager.com/gtag/js?id=G-G84Y44WHKY
SRI Coverage 0 / 13 of external resources have integrity hashes
TagDomainIntegrity
<link>assets2.gyazo.com Missing
<script>www.googletagmanager.com Missing
<script>scripts.clarity.ms Missing
<script>www.clarity.ms Missing
<script>static.ads-twitter.com Missing
<script>snap.licdn.com Missing
<script>connect.facebook.net Missing
<script>connect.facebook.net Missing
<script>www.google-analytics.com Missing
<script>cdn.mxpnl.com Missing
<script>assets2.gyazo.com Missing
<link>fonts.googleapis.com Missing
<script>www.googletagmanager.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

C
Security Headers
Action
5 of 10 headers properly configured
REVIEW
5 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured (consider adding preload)
Got: max-age=63072000; includeSubDomains
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=()
Critical::
Content-Security-Policy header is missing
CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
Expected: default-src 'self'
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
Warning::
Server header reveals version information
The Server header discloses the software version, aiding attackers in targeting known vulnerabilities. Remove the version number.
Got: nginx/1.28.0

CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.

Expected: default-src 'self'
Why this matters

Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.

Learn more

Content-Security-Policy is the browser-enforced firewall against XSS. With a strict CSP, a script injection that would otherwise steal session cookies or rewrite the page is silently blocked. Without it, your only defense is hoping every input on every form is escaped correctly forever.

Source: OWASP / MDN

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

The Server header discloses the software version, aiding attackers in targeting known vulnerabilities. Remove the version number.

Why this matters

Server: nginx/1.18.0 tells attackers exactly which CVEs to test — strip the version string.

Learn more

Server version disclosure helps attackers select exploits matching your stack. Configure your server to omit the version (nginx: `server_tokens off;`, Apache: `ServerTokens Prod`). Doesn't fix vulnerabilities but removes the easy reconnaissance step.

Source: OWASP

B
Cookie Security
3 cookies analyzed, 6 checks passed
REVIEW
3 cookies analyzed, 6 checks passed
Info::
Cookie 'Gyazo_session' has the Secure flag
Info::
Cookie 'Gyazo_session' has the HttpOnly flag
Warning::
Cookie 'Gyazo_session' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
Info::
Cookie 'Gyazo_session' has the Secure flag
Info::
Cookie 'Gyazo_session' has the HttpOnly flag
Info::
Cookie 'Gyazo_session' has SameSite=None
Critical::
Cookie 'GCLB' is missing the Secure flag
Without the Secure flag, this cookie can be sent over unencrypted HTTP, exposing it to interception.
Info::
Cookie 'GCLB' has the HttpOnly flag
Warning::
Cookie 'GCLB' has no SameSite attribute
Without an explicit SameSite attribute, browser default behavior varies. Set SameSite=Lax or Strict.
3 cookies analyzed 1 critical 2 warnings
NameSecureHttpOnlySameSiteSizeIssues
Gyazo_session14 B1
Gyazo_sessionNone555 B1
GCLB22 B2
B
CORS Configuration
No CORS headers
REVIEW
No CORS headers
Info::
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
C
Known vulnerability matches
Action
3 known vulnerability match(es) against detected tech
REVIEW

Known Vulnerabilities

LibraryVersionSeveritySummaryFixed In
Bootstrap3.4.1mediumBootstrap Cross-Site Scripting (XSS) vulnerability for data-* attributes3.4.2
Bootstrap3.4.1mediumImproper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Bootstrap allows Cross-Site Scripting (XSS). This issue affects Bootstrap version 3.4.1. At time of publication, there is no publicly available patched version.3.4.2
Bootstrap3.4.1lowBootstrap before 4.0.0 is end-of-life and no longer maintained.3.999.999
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_CHACHA20_POLY1305_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 154 days)
Got: 2026-09-23T23:59:59Z
Info::
Certificate chain has 3 certificates
Info::
Certificate uses modern signature algorithm
Got: SHA256-RSA
Info::
Certificate covers 2 domain(s)
Got: gyazo.com, *.gyazo.com
Info::
Certificate is issued by a trusted CA
Got: CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1,O=DigiCert Inc,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=gyazo.comIssuer CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1,O=DigiCert Inc,C=USValid 2026-03-09T00:00:00Z → 2026-09-23T23:59:59ZExpires in 154 days SANs gyazo.com, *.gyazo.comSignature SHA256-RSASerial 4c666298600b134f6a9a1f24fd9ef69
Intermediate (CA Certificate)
Subject CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1,O=DigiCert Inc,C=USIssuer CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2021-03-30T00:00:00Z → 2031-03-29T23:59:59ZExpires in 1802 days Signature SHA256-RSASerial cf5bd062b5602f47ab8502c23ccf066
Intermediate (CA Certificate)
Subject CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USIssuer CN=DigiCert Global Root G2,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2013-08-01T12:00:00Z → 2038-01-15T12:00:00ZExpires in 4285 days Signature SHA256-RSASerial 33af1e6a711a9a0bb2864b11d09fae5
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:dmarc-mailauth-reports@notainc.com,mailto:dmarc_agg@vali.email,mailto:re+2f3e3fdbdd6f@inbound.dmarcdigests.com
A+
Transport Security
HTTP/3, HSTS, and TLS version analysis
PASS
HTTP/3, HSTS, and TLS version analysis
Info::
HTTP/3 (QUIC) supported
The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks.
Info::
HSTS enabled (includeSubDomains)
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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