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Security

· 12 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
84
GRADE
B
FIX
1
REVIEW
4
PASS
7
INFO
0
Checks
12
7 PASS 4 REVIEW 1 FIX
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
Security Headers
6 of 10 headers properly configured
REVIEW
6 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured (consider adding preload)
Got: max-age=31536000; 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: no-referrer
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: block-all-mixed-content; default-src 'self' https://cdn.plaid.com/; img-src 'sel…
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
Warning::
X-Powered-By header reveals technology stack
This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.
Got: Next.js
Info::
Server header is present without version info
Got: cloudflare

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

This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.

Why this matters

X-Powered-By: PHP/7.4.3 advertises your stack to attackers — disable it.

Learn more

X-Powered-By and similar headers (X-AspNet-Version, X-Runtime) tell attackers which versions to target. Disable in your server/framework config: PHP `expose_php=Off`, ASP.NET `<httpRuntime enableVersionHeader="false">`, Express `app.disable('x-powered-by')`.

Source: OWASP

B
Content Security Policy
4 of 10 CSP checks passed
REVIEW
4 of 10 CSP checks passed
Info::
Raw CSP policy
Got: block-all-mixed-content; default-src 'self' https://cdn.plaid.com/; img-src 'self' https://images.opencollective.com https://next-images.opencollective.com https://pdf.opencollective.com data: *.paypal.com *.paypalobjects.com opencollective.com blog.opencollective.com blob: i.ytimg.com storage.googleapis.com cdn-logos.gocardless.com opencollective-production.s3.us-west-1.amazonaws.com opencollective-production.s3-us-west-1.amazonaws.com; worker-src 'self'; style-src 'self' 'unsafe-inline' https://hcaptcha.com https://*.hcaptcha.com https://challenges.cloudflare.com; connect-src 'self' https://opencollective-prod-api.herokuapp.com https://pdf.opencollective.com https://rest.opencollective.com https://ml.opencollective.com https://oficollective.com https://oscollective.org wtfismyip.com *.paypal.com *.paypalobjects.com sentry.io *.sentry.io atlas.shopifycloud.com atlas.shopifysvc.com country-service.shopifycloud.com maps.googleapis.com https://wise.com https://transferwise.com https://sandbox.transferwise.tech https://hcaptcha.com https://*.hcaptcha.com https://challenges.cloudflare.com https://www.google.com https://api.cryptonator.com https://plausible.io opencollective-production.s3.us-west-1.amazonaws.com opencollective-production.s3-us-west-1.amazonaws.com https://production.plaid.com/; script-src 'self' 'nonce-a160999c-b15f-42c4-a23b-88b588651ff2' maps.googleapis.com js.stripe.com *.paypal.com *.paypalobjects.com https://hcaptcha.com https://js.hcaptcha.com https://*.hcaptcha.com https://challenges.cloudflare.com https://www.google.com https://plausible.io https://cdn.plaid.com/link/v2/stable/link-initialize.js; frame-src blob: www.youtube.com www.youtube-nocookie.com opencollective.com anchor.fm podcasters.spotify.com player.vimeo.com js.stripe.com *.paypal.com *.openstreetmap.org https://wise.com https://transferwise.com https://sandbox.transferwise.tech https://hcaptcha.com https://*.hcaptcha.com https://challenges.cloudflare.com https://www.google.com https://cdn.plaid.com/; object-src opencollective.com
Info::
default-src directive is set
Got: default-src 'self' https://cdn.plaid.com/
Info::
No 'unsafe-inline' in script source
Info::
No 'unsafe-eval' in script source
Info::
No wildcard in script source
Warning::
object-src allows plugin content
Set object-src to 'none' to prevent Flash/Java plugin exploits.
Got: object-src opencollective.com Expected: 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'
Warning::
frame-ancestors directive is missing
frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.
Expected: frame-ancestors 'self'
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

Set object-src to 'none' to prevent Flash/Java plugin exploits.

Expected: object-src 'none'
Why this matters

object-src open in CSP allows Flash/PDF/plugin embedding — a now-deprecated attack vector that should be explicitly blocked.

Learn more

object-src controls <object>, <embed>, and <applet> elements. Modern sites have no need for plugins; setting `object-src 'none'` blocks an entire class of legacy XSS vectors at zero cost. If your CSP missed it, add the directive.

Source: MDN CSP

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

frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.

Expected: frame-ancestors 'self'
Why this matters

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

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

block-all-mixed-content
default-src 'self'https://cdn.plaid.com/
img-src 'self'https://images.opencollective.comhttps://next-images.opencollective.comhttps://pdf.opencollective.comdata:*.paypal.com*.paypalobjects.comopencollective.comblog.opencollective.comblob:i.ytimg.comstorage.googleapis.comcdn-logos.gocardless.comopencollective-production.s3.us-west-1.amazonaws.comopencollective-production.s3-us-west-1.amazonaws.com
worker-src 'self'
style-src 'self''unsafe-inline'https://hcaptcha.comhttps://*.hcaptcha.comhttps://challenges.cloudflare.com
connect-src 'self'https://opencollective-prod-api.herokuapp.comhttps://pdf.opencollective.comhttps://rest.opencollective.comhttps://ml.opencollective.comhttps://oficollective.comhttps://oscollective.orgwtfismyip.com*.paypal.com*.paypalobjects.comsentry.io*.sentry.ioatlas.shopifycloud.comatlas.shopifysvc.comcountry-service.shopifycloud.commaps.googleapis.comhttps://wise.comhttps://transferwise.comhttps://sandbox.transferwise.techhttps://hcaptcha.comhttps://*.hcaptcha.comhttps://challenges.cloudflare.comhttps://www.google.comhttps://api.cryptonator.comhttps://plausible.ioopencollective-production.s3.us-west-1.amazonaws.comopencollective-production.s3-us-west-1.amazonaws.comhttps://production.plaid.com/
script-src 'self''nonce-a160999c-b15f-42c4-a23b-88b588651ff2'maps.googleapis.comjs.stripe.com*.paypal.com*.paypalobjects.comhttps://hcaptcha.comhttps://js.hcaptcha.comhttps://*.hcaptcha.comhttps://challenges.cloudflare.comhttps://www.google.comhttps://plausible.iohttps://cdn.plaid.com/link/v2/stable/link-initialize.js
frame-src blob:www.youtube.comwww.youtube-nocookie.comopencollective.comanchor.fmpodcasters.spotify.complayer.vimeo.comjs.stripe.com*.paypal.com*.openstreetmap.orghttps://wise.comhttps://transferwise.comhttps://sandbox.transferwise.techhttps://hcaptcha.comhttps://*.hcaptcha.comhttps://challenges.cloudflare.comhttps://www.google.comhttps://cdn.plaid.com/
object-src opencollective.com
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
B
security.txt
Published with 1 contact(s)
REVIEW

security.txt

Contact: security@opencollective.com
Policy: https://opencollective.com/.well-known/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 46 days)
Got: 2026-06-07T16:12:45Z
Info::
Certificate chain has 3 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA256
Info::
Certificate covers 2 domain(s)
Got: opencollective.com, *.opencollective.com
Info::
Certificate is issued by a trusted CA
Got: CN=WE1,O=Google Trust Services,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=opencollective.comIssuer CN=WE1,O=Google Trust Services,C=USValid 2026-03-09T15:12:52Z → 2026-06-07T16:12:45ZExpires in 46 days SANs opencollective.com, *.opencollective.comSignature ECDSA-SHA256Serial ad02c5f31d1279270d64ae98a49c8447
Intermediate (CA Certificate)
Subject CN=WE1,O=Google Trust Services,C=USIssuer CN=GTS Root R4,O=Google Trust Services LLC,C=USValid 2023-12-13T09:00:00Z → 2029-02-20T14:00:00ZExpires in 1035 days Signature ECDSA-SHA384Serial 7ff31977972c224a76155d13b6d685e3
Intermediate (CA Certificate)
Subject CN=GTS Root R4,O=Google Trust Services LLC,C=USIssuer CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BEValid 2023-11-15T03:43:21Z → 2028-01-28T00:00:42ZExpires in 645 days Signature SHA256-RSASerial 7fe530bf331343bedd821610493d8a1b
A+
Cookie Security
No cookies set — no cookie security risks
PASS
No cookies set — no cookie security risks
Info::
No cookies set — no cookie security risks

No cookies detected — no cookie security risks to report.

A+
Subresource Integrity
1 of 1 external resources have SRI
PASS
1 of 1 external resources have SRI
Info::
script from static.cloudflareinsights.com has SRI protection
SRI Coverage 1 / 1 of external resources have integrity hashes
TagDomainIntegrity
<script>static.cloudflareinsights.com Protected
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
Email Security
DMARC: quarantine
PASS
DMARC: quarantine
Info::
DMARC policy is quarantine — good protection
DMARC
Policy quarantine — good protection Record v=DMARC1; p=quarantine; rua=mailto:a94f0f8bedd9462db42f2d5111dbd025@dmarc-reports.cloudflare.net
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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