Notion

Below the B minimum (70/100) in our RFP clause. A buyer using it would ask for a dated fix for each missing header.

With these headers missing, notion.com is more exposed to malicious JavaScript and clickjacking.

Missing 5

• X-Content-Type-Options 0 of 10

  Stops the browser guessing a file's type instead of trusting the type the server declared.

  Without it: A file uploaded as an image or plain text can be reinterpreted as HTML or script and run inside the product's own origin: malicious JavaScript delivered through a harmless-looking upload feature.

• Permissions-Policy 0 of 10

  Switches off browser features the product does not use, such as camera, microphone, location and payments, for the page and anything embedded in it.

  Without it: Any script or iframe on the page, including third-party ads and chat widgets, can ask the user for camera, microphone or location access under the vendor's name.

• Cross-Origin-Opener-Policy 0 of 5

  Cuts the link between the product's window and windows opened by, or opening, other sites.

  Without it: A page that opens the product keeps a handle on its window and can later redirect it to a look-alike sign-in or payment page (tab-nabbing) while the user thinks they are still on the real site. It is also part of the isolation browsers need to defend against Spectre-style attacks.

• Cross-Origin-Resource-Policy 0 of 5

  Tells browsers which sites may load this site's resources.

  Without it: Other sites can pull the product's responses into their own pages, which makes side-channel leaks of what a signed-in user can see easier.

• No version disclosure 0 of 5

  Keeps the Server and X-Powered-By headers from announcing exact software versions.

  Without it: A header like "nginx/1.18.0" or "PHP/7.4" tells an attacker which known vulnerabilities to try, and flags possibly unpatched software to every automated scanner on the internet.

Sent 4

• Content-Security-Policy 25 of 25

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https://api.forethought.ai https://http-inputs-notion.splunkcloud.com https://*.sentry.io https://checkout.stripe.com https://js.stripe.com https://m.stripe.com https://library.notion.com https://d8ejoa1fys2rk.cloudfront.net https://cdn.contentful.com https://preview.contentful.com https://images.ctfassets.net https://tracking.chilipiper.com https://api.chilipiper.com https://api.unsplash.com https://api.giphy.com/ https://giphy-analytics.giphy.com/ https://media0.giphy.com/ https://media1.giphy.com/ https://media2.giphy.com/ https://media3.giphy.com/ https://media4.giphy.com/ https://media5.giphy.com/ https://media6.giphy.com/ https://media7.giphy.com/ https://media8.giphy.com/ https://media9.giphy.com/ https://media10.giphy.com/ https://boards-api.greenhouse.io https://accounts.google.com https://oauth2.googleapis.com https://vimeo.com https://player.vimeo.com https://youtube.com https://www.youtube.com https://www.googletagmanager.com https://analytics.google.com https://ad.doubleclick.net/ccm/s/collect https://www.googleadservices.com https://googleads.g.doubleclick.net https://region1.google-analytics.com https://region1.analytics.google.com https://www.google-analytics.com https://cdn.metadata.io https://platformapi.metadata.io https://api-gw.metadata.io https://api.cr-relay.com https://d2hrivdxn8ekm8.cloudfront.net https://d1lu3pmaz2ilpx.cloudfront.net https://dvqigh9b7wa32.cloudfront.net https://d330aiyvva2oww.cloudfront.net https://verifi.podscribe.com https://verifi.pdscrb.com https://pixel.tapad.com https://ipv4.podscribe.com https://ipv4.pdscrb.com https://transcend-cdn.com https://telemetry.transcend.io https://wcs.naver.com https://api.statsig.com https://statsigapi.net https://exp.notion.com https://us1.gb-ingest.com https://api.box.com https://api.tailorhq.ai https://app.tailorhq.ai https://cdn.tailorhq.ai https://cached-api.tailorhq.ai https://*.mux.com https://api.sprig.com https://storage.googleapis.com https://cdn.sprig.com https://cdn.userleap.com https://assets.customer.io https://track.customer.io https://*.api.gist.build https://*.cloud.gist.build https://www.google.com https://hcaptcha.com https://*.hcaptcha.com https://tiles.versatiles.org https://maps.googleapis.com https://places.googleapis.com https://8d4f9jvuda.algolia.net https://pagead2.googlesyndication.com https://google.com https://x.clearbitjs.com https://app.clearbitjs.com https://connect.facebook.net https://snap.licdn.com/ https://px.ads.linkedin.com/ https://munchkin.marketo.net https://*.mktoresp.com https://info.notion.com https://bat.bing.com https://s.yimg.jp https://www.youtube-nocookie.com https://www.youtube.com/iframe_api https://js.partnerstack.com https://grsm.io https://partnerlinks.io https://analytics.tiktok.com/ https://vitals.vercel-insights.com https://va.vercel-scripts.com https://vercel.live https://www.redditstatic.com https://static.ads-twitter.com https://insights.metadata.io https://bzr.openai.com 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blob:;media-src blob: https: http: https://*.mux.com

• Strict-Transport-Security 20 of 20

  max-age=31536000; includeSubDomains; preload

• Frame protection 10 of 10

  CSP frame-ancestors

• Referrer-Policy 10 of 10

  strict-origin-when-cross-origin

Checked 2026-10-07 at https://www.notion.com/. Re-checked every 7 days. The grade covers the headers this website sends, not the product’s overall security. How the grade works.