https://www.duolingo.com/

Scan ID:: 58dd81f5-251e-43a4-b521-ede434552dc0Finished
Submitted URL:: https://duolingo.com/Redirected
Report Finished:: Sep 20, 2024, 20:34:35

Risks · 0 found

Practices that may pose security risks

Security Headers · 1 found

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

Name	Value	Support	Info
Strict-Transport-Security	—	Good	Declare that a website is only accessible over a secure connection (HTTPS). Click to learn more...
X-Frame-Options	SAMEORIGIN	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	—	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 · 8 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
*.duolingo.com	Nov 21, 2023, 11:30:23	Dec 22, 2024, 11:30:23
cookielaw.org	Aug 13, 2024, 18:36:46	Nov 11, 2024, 19:36:43
misc.google.com	Aug 26, 2024, 06:38:24	Nov 18, 2024, 06:38:23
*.cloudfront.net	Jul 30, 2024, 00:00:00	Jul 3, 2025, 23:59:59
geolocation.onetrust.com	Aug 13, 2024, 18:27:06	Nov 11, 2024, 19:27:02
*.gstatic.com	Aug 26, 2024, 07:12:45	Nov 18, 2024, 07:12:44
*.google-analytics.com	Aug 26, 2024, 06:33:47	Nov 18, 2024, 06:33:46
accounts.google.com	Aug 26, 2024, 07:15:53	Nov 18, 2024, 07:15:52