https://www.w3.org/TR/html4/loose.dtd

Scan ID:: 4af27a9c-a576-4a46-93dd-0461c041e9fcFinished
Submitted URL:: https://www.w3.org/TR/html4/loose.dtd
Report Finished:: Dec 13, 2024, 13:17:06

Risks · 0 found

Practices that may pose security risks

Security Headers · 2 found

HTTP response headers that can harden the security of a web application

Name	Value	Support	Info
Strict-Transport-Security	max-age=15552000; includeSubdomains; preload	Good	Declare that a website is only accessible over a secure connection (HTTPS). Click to learn more...
X-Frame-Options	—	Good	Indicate whether a browser should be allowed to render a page in a <frame>, <iframe>, <embed> or <object>. Click to learn more...
X-Content-Type-Options	—	Good	Indicate that the MIME types advertised in the Content-Type headers should be followed and not be changed. Click to learn more...
Content-Security-Policy	frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests	Good	Control resources the user agent is allowed to load for a given page. Click to learn more...
Referrer-Policy	—	Good	Control how much referrer information should be included with requests. Click to learn more...
Clear-Site-Data	—	Good	Control the data stored by a client browser for their origins. Click to learn more...
X-Permitted-Cross-Domain-Policies	—	Good	Control whether a web client such as Adobe Flash Player or Adobe Acrobat has permission to handle data across domains. Click to learn more...
Permissions-Policy	—	New	Allow and deny the use of browser features in a document or iframe. Click to learn more...
Cross-Origin-Embedder-Policy	—	New	Configure embedding cross-origin resources into the document. Click to learn more...
Cross-Origin-Opener-Policy	—	New	Ensure a top-level document does not share a browsing context group with cross-origin documents. Click to learn more...
Cross-Origin-Resource-Policy	—	New	Request that the browser blocks no-cors cross-origin/cross-site requests to the given resource. Click to learn more...
X-XSS-Protection	—	Deprecated	Deprecated. Stops pages from loading when they detect reflected cross-site scripting (XSS) attacks. Click to learn more...
Feature-Policy	—	Deprecated	Deprecated. Replaced by the Permissions-Policy header. Click to learn more...
Expect-CT	—	Deprecated	Deprecated. Opt in to reporting and/or enforcement of Certificate Transparency requirements. Click to learn more...
Public-Key-Pins	—	Deprecated	Deprecated. Allows HTTPS websites to resist impersonation by attackers using mis-issued or otherwise fraudulent certificates. Click to learn more...

Security Violations · 0 found

Requests or resources offending security policies

Certificates · 1 found

SSL/TLS Certificates enable websites to encrypt transactions between the client and the server and provide server identity verification

Subject	Issue date	Expiry date
w3.org	Nov 25, 2024, 23:13:55	Feb 24, 2025, 00:13:54