Security Report Summary
A
Site: https://hedge.fachschaft.informatik.uni-kl.de/s/iL6OTxbfq
IP Address: 131.246.168.138
Report Time: 03 Jun 2026 23:50:50 UTC
Headers:
  • Referrer-Policy
  • Content-Security-Policy
  • Strict-Transport-Security
  • X-Frame-Options
  • X-Content-Type-Options
  • Permissions-Policy
Advanced:
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Missing Headers
X-Content-Type-OptionsX-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. The only valid value for this header is "X-Content-Type-Options: nosniff".
Permissions-PolicyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
Warnings
Status code indicates errorThe status code of the response indicates an error. Not all headers may be set when the response is an error.
Raw Headers
HTTP/2404
servernginx
dateWed, 03 Jun 2026 23:50:50 GMT
content-typetext/html; charset=utf-8
x-powered-byExpress
referrer-policysame-origin
content-security-policydefault-src 'none';base-uri 'self';connect-src 'self' wss://hedge.fachschaft.informatik.uni-kl.de https://vimeo.com/api/v2/video/;font-src 'self';manifest-src 'self';frame-src 'self' https://player.vimeo.com https://www.youtube.com https://gist.github.com;img-src * data:;script-src https://hedge.fachschaft.informatik.uni-kl.de/build/ https://hedge.fachschaft.informatik.uni-kl.de/js/ https://hedge.fachschaft.informatik.uni-kl.de/config 'unsafe-inline' 'nonce-050f5417-c2b7-48a8-ab84-2179d4a2f11e' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM=';style-src https://hedge.fachschaft.informatik.uni-kl.de/build/ https://hedge.fachschaft.informatik.uni-kl.de/css/ 'unsafe-inline';object-src *;form-action 'self';media-src *;frame-ancestors 'self';upgrade-insecure-requests
hedgedoc-version1.10.8
etagW/"2f95-Z5Ry28qbJIwlPNSdI2DOfqjHKUY"
set-cookieconnect.sid=s%3A0MpMgM3er65_WkVWx48148m-eDnvzDCY.4NxBScQosz8MxvfyAaWguBr33ONOX%2FpcpApUYpy7nro; Path=/; Expires=Wed, 17 Jun 2026 23:50:50 GMT; HttpOnly; Secure; SameSite=Lax
varyAccept-Encoding
content-encodinggzip
strict-transport-securitymax-age=31536000; includeSubDomains
X-Frame-OptionsHeader not set, see Additional Information below.
Upcoming Headers
Cross-Origin-Embedder-PolicyCross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP.
Cross-Origin-Opener-PolicyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.
Cross-Origin-Resource-PolicyCross-Origin Resource Policy allows a resource owner to specify who can load the resource.
Additional Information
serverThis Server header seems to advertise the software being run on the server but you can remove or change this value.
x-powered-byX-Powered-By can usually be seen with values like "PHP/5.5.9-1ubuntu4.5" or "ASP.NET". Trying to minimise the amount of information you give out about your server is a good idea. This header should be removed or the value changed.
referrer-policyReferrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites.
content-security-policyContent Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources of approved content, you can prevent the browser from loading malicious assets. Analyse this policy in more detail. You can sign up for a free account on Report URI to collect reports about problems on your site.
strict-transport-securityHTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
X-Frame-OptionsThe XFO header was not sent but frame-ancestors in Content Security Policy was used instead.