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Security

· 13 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
0
Checks
13
5 PASS 3 REVIEW 5 FIX
D
Security Headers
Action
4 of 10 headers properly configured
FIX
4 of 10 headers properly configured
Warning::
HSTS is missing includeSubDomains
Without includeSubDomains, subdomains can still be accessed over HTTP.
Got: max-age=63072000 Expected: max-age=31536000; includeSubDomains
Warning::
X-Content-Type-Options header is missing
This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
Expected: nosniff
Info::
X-Frame-Options is properly configured
Got: DENY
Warning::
Referrer-Policy header is missing
Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
Expected: 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=()
Info::
Content-Security-Policy is present
Got: default-src blob: data: https: 'unsafe-inline' 'unsafe-eval'; script-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
Info::
Server header is present without version info
Got: nginx

Without includeSubDomains, subdomains can still be accessed over HTTP.

Expected: max-age=31536000; includeSubDomains
Why this matters

Without includeSubDomains, a forgotten dev subdomain over HTTP can set malicious cookies that ride to the apex.

Learn more ▾

HSTS without includeSubDomains protects only the exact domain. Cookies set on a non-HSTS subdomain can ride to the apex via cookie-scope attacks. The fix is one directive append. Verify all subdomains support HTTPS first — adding includeSubDomains to a domain with HTTP-only subdomains breaks them.

Source: RFC 6797

This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.

Expected: nosniff
Why this matters

MIME sniffing lets browsers run uploaded files as JavaScript, turning a file upload into an XSS.

Learn more ▾

Setting X-Content-Type-Options: nosniff tells browsers to trust your declared Content-Type instead of guessing. Without it, an attacker who uploads a polyglot file can sometimes get it executed as a script. One header, no downside.

Source: OWASP / MDN

Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.

Expected: strict-origin-when-cross-origin
Why this matters

Default browser behavior leaks full URLs (including query params and tokens) to every third-party resource — set a strict policy.

Learn more ▾

Without a Referrer-Policy header, browsers send the full referring URL with images, scripts, and fonts loaded from third-party origins. URLs containing tokens, user IDs, or session params end up in third-party logs. Set `Referrer-Policy: strict-origin-when-cross-origin` (or stricter) to limit leakage.

Source: MDN / W3C

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

D
Content Security Policy
Action
4 of 10 CSP checks passed
FIX
4 of 10 CSP checks passed
Info::
Raw CSP policy
Got: default-src blob: data: https: 'unsafe-inline' 'unsafe-eval'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://store.akamai.steamstatic.com/ https://store.akamai.steamstatic.com/ https://recaptcha.net https://www.google.com/recaptcha/ https://www.gstatic.cn/recaptcha/ https://www.gstatic.com/recaptcha/ https://www.youtube.com/ https://s.ytimg.com https://steamcommunity-a.akamaihd.net; object-src 'none'; connect-src 'self' http://store.steampowered.com https://store.steampowered.com http://127.0.0.1:27060 ws://127.0.0.1:27060 https://community.akamai.steamstatic.com/ https://steamcommunity.com/ https://steamcommunity.com/ wss://community.steam-api.com/websocket/ https://api.steampowered.com/ https://login.steampowered.com/ https://help.steampowered.com/ https://steam.tv/ https://shared.akamai.steamstatic.com/ https://checkout.steampowered.com/ https://*.steamstatic.com https://*.steamcontent.com https://*.valvesoftware.com https://*.steambeta.net https://*.discovery.beta.steamserver.net https://*.cqloud.com https://steambroadcast.akamaized.net https://steambroadcast-test.akamaized.net https://broadcast.st.dl.eccdnx.com https://lv.queniujq.cn https://steambroadcastchat.akamaized.net https://api.steampowered.com https://steamvideo-a.akamaihd.net https://video.st.dl.eccdnx.com https://vd.queniujq.cn https://video.cdn.steamchina.eccdnx.com https://video.cdn.queniuqe.com https://video.cdn.steamchina.queniuam.com https://*.storage.googleapis.com; frame-src 'self' steam: http://www.youtube.com https://www.youtube.com https://www.youtube-nocookie.com https://www.google.com https://sketchfab.com https://player.vimeo.com https://steamcommunity.com/ https://login.steampowered.com/ https://help.steampowered.com/ https://checkout.steampowered.com/ https://www.google.com/recaptcha/ https://recaptcha.net/recaptcha/ https://steamcommunity.com/; frame-ancestors 'none';
Info::
default-src directive is set
Got: default-src blob: data: https: 'unsafe-inline' 'unsafe-eval'
Critical::
'unsafe-inline' found in script source
'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.
Got: script-src 'self' 'unsafe-inline' 'unsafe-eval' https://store.akamai.steamstatic.com/ https://store.akamai.steamstatic.com/ https://recaptcha.net https://www.google.com/recaptcha/ https://www.gstatic.cn/recaptcha/ https://www.gstatic.com/recaptcha/ https://www.youtube.com/ https://s.ytimg.com https://steamcommunity-a.akamaihd.net
Critical::
'unsafe-eval' found in script source
'unsafe-eval' allows eval() and similar functions, enabling code injection. Remove it.
Got: script-src 'self' 'unsafe-inline' 'unsafe-eval' https://store.akamai.steamstatic.com/ https://store.akamai.steamstatic.com/ https://recaptcha.net https://www.google.com/recaptcha/ https://www.gstatic.cn/recaptcha/ https://www.gstatic.com/recaptcha/ https://www.youtube.com/ https://s.ytimg.com https://steamcommunity-a.akamaihd.net
Info::
No wildcard in script source
Info::
object-src is set to 'none'
Got: object-src 'none'
Warning::
base-uri directive is missing
Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.
Expected: base-uri 'self'
Info::
frame-ancestors directive is set
Got: frame-ancestors 'none'
Warning::
form-action directive is missing
form-action restricts where forms can submit data, preventing form hijacking.
Expected: form-action 'self'
Info::
upgrade-insecure-requests is not set
This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.
Expected: upgrade-insecure-requests

'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.

Why this matters

Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.

Learn more ▾

unsafe-inline allows inline <script> tags; unsafe-eval allows eval() and similar. Both are necessary for some legacy code but explicitly dangerous. Migrate to nonces (per-page random tokens) or hashes (per-script SHA-256) instead.

Source: OWASP CSP / MDN

'unsafe-eval' allows eval() and similar functions, enabling code injection. Remove it.

Why this matters

Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.

Learn more ▾

unsafe-inline allows inline <script> tags; unsafe-eval allows eval() and similar. Both are necessary for some legacy code but explicitly dangerous. Migrate to nonces (per-page random tokens) or hashes (per-script SHA-256) instead.

Source: OWASP CSP / MDN

Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.

Expected: base-uri 'self'
Why this matters

Missing base-uri in CSP leaves a base-tag injection attack path open even on otherwise strict policies.

Learn more ▾

A common omission: developers add CSP for script-src and frame-ancestors but forget base-uri. The result is a CSP that looks strict but lets an attacker rewrite every URL on the page via <base href>. Add `base-uri 'self'` to close the gap.

Source: MDN CSP

form-action restricts where forms can submit data, preventing form hijacking.

Expected: form-action 'self'
Why this matters

Security gaps expose your site and users to attacks, eroding trust.

This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.

Expected: upgrade-insecure-requests
Why this matters

Without upgrade-insecure-requests, any HTTP subresource link survives as a mixed-content warning instead of auto-upgrading.

Learn more ▾

Adding `upgrade-insecure-requests` to your CSP turns every http:// subresource fetch into https:// at the browser layer. One-line defense against accidental mixed content from legacy links or third-party widgets.

Source: MDN CSP

Parsed Policy

default-src blob:data:https:'unsafe-inline''unsafe-eval'
script-src 'self''unsafe-inline''unsafe-eval'https://store.akamai.steamstatic.com/https://store.akamai.steamstatic.com/https://recaptcha.nethttps://www.google.com/recaptcha/https://www.gstatic.cn/recaptcha/https://www.gstatic.com/recaptcha/https://www.youtube.com/https://s.ytimg.comhttps://steamcommunity-a.akamaihd.net
object-src 'none'
connect-src 'self'http://store.steampowered.comhttps://store.steampowered.comhttp://127.0.0.1:27060ws://127.0.0.1:27060https://community.akamai.steamstatic.com/https://steamcommunity.com/https://steamcommunity.com/wss://community.steam-api.com/websocket/https://api.steampowered.com/https://login.steampowered.com/https://help.steampowered.com/https://steam.tv/https://shared.akamai.steamstatic.com/https://checkout.steampowered.com/https://*.steamstatic.comhttps://*.steamcontent.comhttps://*.valvesoftware.comhttps://*.steambeta.nethttps://*.discovery.beta.steamserver.nethttps://*.cqloud.comhttps://steambroadcast.akamaized.nethttps://steambroadcast-test.akamaized.nethttps://broadcast.st.dl.eccdnx.comhttps://lv.queniujq.cnhttps://steambroadcastchat.akamaized.nethttps://api.steampowered.comhttps://steamvideo-a.akamaihd.nethttps://video.st.dl.eccdnx.comhttps://vd.queniujq.cnhttps://video.cdn.steamchina.eccdnx.comhttps://video.cdn.queniuqe.comhttps://video.cdn.steamchina.queniuam.comhttps://*.storage.googleapis.com
frame-src 'self'steam:http://www.youtube.comhttps://www.youtube.comhttps://www.youtube-nocookie.comhttps://www.google.comhttps://sketchfab.comhttps://player.vimeo.comhttps://steamcommunity.com/https://login.steampowered.com/https://help.steampowered.com/https://checkout.steampowered.com/https://www.google.com/recaptcha/https://recaptcha.net/recaptcha/https://steamcommunity.com/
frame-ancestors 'none'
F
Subresource Integrity
Action
0 of 27 external resources have SRI
FIX
0 of 27 external resources have SRI
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/css/motiva_sans.css?v=YzJgj1FjzW34&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/css/shared_global.css?v=qbbUOQL2SbhT&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/css/buttons.css?v=BZhNEtESfYSJ&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/v6/store.css?v=13CjnPuGjLMj&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/styles_linux.css?v=LcZAgwD7_TSW&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/v6/home.css?v=7t7Azxf9pBoE&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/v6/creator_hub.css?v=W3_oCd4QrKak&l=english&_cdn=fastly
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/css/shared_responsive.css?v=gMkuLjBtRR-V&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/javascript/jquery-1.8.3.min.js?v=NXam5zydzNu8&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/javascript/tooltip.js?v=k5leO7MVvAaV&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/javascript/shared_global.js?v=74PhtZvVZD8D&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/javascript/auth_refresh.js?v=w6QbwI-5-j2S&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/main.js?v=2jl8YRZgA0FC&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/dynamicstore.js?v=YfwgycQUrKfu&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/home.js?v=zqt349PxLqfO&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/cluster.js?v=Xhyo8cGiiO4M&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/shared/javascript/shared_responsive_adapter.js?v=XZm6x5HVwOht&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/libraries~be6775ae1.js?contenthash=aad21d6ab11db9546cbf
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/libraries~73ab827c1.js?contenthash=07947655aa3af5e2f319
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/applications/store/chunk~2dc60a8f0.css?contenthash=d851ab6f5de64a61a1e6
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/chunk~2dc60a8f0.js?contenthash=bc2bc61a6b4d41a1f890
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/applications/store/footer.css?contenthash=c41c86784f93e8b7afe0
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/footer.js?contenthash=c02f5af2fe13c839749d
Warning::
External link from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/css/applications/store/main.css?v=8uAbPKjh_iOP&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/manifest.js?v=HE3Cjo_DoCya&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/libraries~b28b7af69.js?v=2YtNk3cAAsTl&l=english&_cdn=fastly
Warning::
External script from store.fastly.steamstatic.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://store.fastly.steamstatic.com/public/javascript/applications/store/main.js?v=CYgBmprFPCW8&l=english&_cdn=fastly
SRI Coverage 0 / 27 of external resources have integrity hashes
TagDomainIntegrity
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<link>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
<script>store.fastly.steamstatic.com✗ Missing
F
Email Security
Action
No DMARC
FIX
No DMARC
Warning::
No DMARC record found
Without DMARC, email receivers have no policy for handling authentication failures.
DMARC

No DMARC record found

Without DMARC, email receivers have no policy for handling authentication failures from your domain.

Without DMARC, email receivers have no policy for handling authentication failures.

Why this matters

Without DMARC, anyone can send phishing emails using your domain name.

Learn more ▾

DMARC tells receiving mail servers what to do with email that fails SPF/DKIM checks for your domain. With a strict 'p=reject' policy, spoofed emails get bounced; without it they reach the inbox. Domains used in phishing campaigns lose deliverability and brand trust fast.

Source: DMARC.org / NIST

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=()
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
8 known vulnerability match(es) against detected tech
REVIEW

Known Vulnerabilities

LibraryVersionSeveritySummaryFixed In
jQuery1.8.3mediumSelector interpreted as HTML1.9.0b1
jQuery1.8.3mediumVersions of jquery prior to 1.9.0 are vulnerable to Cross-Site Scripting. The load method fails to recognize and remove "<script>" HTML tags that contain a whitespace character, i.e: "</script >", which results in the enclosed script logic to be executed. This allows attackers to execute arbitrary JavaScript in a victim's browser. ## Recommendation Upgrade to version 1.9.0 or later.1.9.0
jQuery1.8.3medium3rd party CORS request may execute1.12.0
jQuery1.8.3mediumparseHTML() executes scripts in event handlers2.2.0
jQuery1.8.3lowjQuery 1.x and 2.x are End-of-Life and no longer receiving security updates2.999.999
jQuery1.8.3mediumjQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution3.4.0
jQuery1.8.3mediumpassing HTML containing <option> elements from untrusted sources - even after sanitizing it - to one of jQuery's DOM manipulation methods (i.e. .html(), .append(), and others) may execute untrusted code.3.5.0
jQuery1.8.3mediumRegex in its jQuery.htmlPrefilter sometimes may introduce XSS3.5.0
B
security.txt
Published with 0 contact(s)
REVIEW

security.txt

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 118 days)
Got: 2026-08-17T23:59:59Z
Info::
Certificate chain has 2 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA384
Info::
Certificate covers 2 domain(s)
Got: store.steampowered.com, checkout.steampowered.com
Info::
Certificate is issued by a trusted CA
Got: CN=DigiCert Global G3 TLS ECC SHA384 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.

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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 SERIALNUMBER=602 290 773,CN=store.steampowered.com,O=Valve Corp,L=Bellevue,ST=Washington,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130a57617368696e67746f6e,1.3.6.1.4.1.311.60.2.1.3=#13025553Issuer CN=DigiCert Global G3 TLS ECC SHA384 2020 CA1,O=DigiCert Inc,C=USValid 2025-08-15T00:00:00Z → 2026-08-17T23:59:59ZExpires in 118 days SANs store.steampowered.com, checkout.steampowered.comSignature ECDSA-SHA384Serial f7b42b23c3230ec77d77e7b4456029d
Intermediate (CA Certificate)
Subject CN=DigiCert Global G3 TLS ECC SHA384 2020 CA1,O=DigiCert Inc,C=USIssuer CN=DigiCert Global Root G3,OU=www.digicert.com,O=DigiCert Inc,C=USValid 2021-04-14T00:00:00Z → 2031-04-13T23:59:59ZExpires in 1818 days Signature ECDSA-SHA384Serial b00e92d4d6d731fca3059c7cb1e1886
A+
Cookie Security
2 cookies analyzed, 5 checks passed
PASS
2 cookies analyzed, 5 checks passed
Info::
Cookie 'steamCountry' has the Secure flag
Info::
Cookie 'steamCountry' has the HttpOnly flag
Info::
Cookie 'steamCountry' has SameSite=None
Info::
Cookie 'sessionid' has the Secure flag
Warning::
Cookie 'sessionid' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'sessionid' has SameSite=None
2 cookies analyzed 1 warnings
NameSecureHttpOnlySameSiteSizeIssues
steamCountry✓✓None49 B—
sessionid✓✗None33 B1
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::
security.txt is present — good practice
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✗ ExposedSecurity PolicyInfo
A
Transport Security
HTTP/3, HSTS, and TLS version analysis
PASS
HTTP/3, HSTS, and TLS version analysis
Info::
HTTP/3 (QUIC) not advertised
HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
Info::
HSTS enabled (base policy)
Info::
HSTS missing includeSubDomains
Without includeSubDomains, HSTS only protects the exact domain.
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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