~/tools / security-headers
Security Headers Checker
Scan HTTP security headers. Grades HSTS, CSP, X-Frame-Options and others, with explanations of what each header protects.
[ WARNING ]
Decent but improvable (57/100) — missing: Referrer-Policy, Permissions-Policy · weak: content-security-policy
── output ─────
57
security_score
HTTP 200 · https://www.linkedin.com/
Strict-Transport-Security (HSTS)
[ STRONG ]
// Forces HTTPS for all connections. Prevents downgrade attacks.
max-age=31536000
Content-Security-Policy (CSP)
[ WEAK ]
// Defines which sources of scripts/styles/images are allowed. Prevents XSS.
default-src 'none'; connect-src 'self' *.licdn.com *.linkedin.com cdn.linkedin.oribi.io dpm.demdex.net/id lnkd.demdex.net blob: accounts.google.com/gsi/ linkedin.sc.omtrdc.net/b/ss/ v.clarity.ms/collect *.microsoft.com *.adnxs.com *.tealiumiq.com login.microsoftonline.com bat.bing.com lnkd.tt.omtrdc.net/rest/v1/delivery www.google.com google.com adservice.google.com pagead2.googlesyndication.com td.doubleclick.net www.googletagmanager.com www.googleadservices.com ad.doubleclick.net googleads.g.doubleclick.net; script-src 'report-sample' 'sha256-th47JTnh6tX15SUn/I+GGmsOSXpa7dh5Skner77gxlY=' 'sha256-SSoodjUD3LGm2FfFCVHGqEb8D4UM3OOigidT2UKDcYg=' 'sha256-cKTgdnmO6+hXd85a9wKg1effVfVzenUAtUCyOKY9bQE=' 'sha256-DwtT8+ZZKpxH9pqZNAmJ3GdbLAh5SsYaXR3omTXPCns=' 'sha256-sV9jZa797T0QWBzcU/CNd4tpBhTnh+TFdLnfjlitl28=' 'sha256-aa/Q8CRBDSqTQbCIyioPhZaz+G+dbPyu7BzsjInEmiU=' 'sha256-THuVhwbXPeTR0HszASqMOnIyxqEgvGyBwSPBKBF/iMc=' 'sha256-zTIusdVJJeXz9+iox2a+pdDglzbpRpFVRzEwvW4AONk=' 'sha256-iC8MPqNLw0FDnsBf4DlSkFLNTwhkI85aouiAEB819ic=' 'sha256-2EqrEvcPzl8c6/TSGVvaVMEe7lg700MAz/te4/3kTYY=' 'sha256-y5uW69VItKj51mcc7UD9qfptDVUqicZL+bItEpvVNDw=' 'sha256-DatsFGoJ8gFkzzxo47Ou76WZ+3QBPOQHtBu9p9b3DhA=' 'sha256-k95cyM8gFgPziZe5VQ2IvJvBUVyd5zFt2CokIUwqdHE=' 'sha256-PyCXNcEkzRWqbiNr087fizmiBBrq9O6GGD8eV3P09Ik=' 'sha256-RFqsjmAF1N5LnfpaHFvPqFlVkeIS/DtTAFor+JjJJVc=' 'sha256-2SQ55Erm3CPCb+k03EpNxU9bdV3XL9TnVTriDs7INZ4=' 'sha256-S/KSPe186K/1B0JEjbIXcCdpB97krdzX05S+dHnQjUs=' 'sha256-9pXOIwF4N0gPltLd3AI69lkCjSC2H/Eb3sc5zdmUyYU=' 'sha256-jou6v/Nleyzoc+LXktAv1Fp8M807dVVxy7E/yzVljHc=' 'sha256-6E4e/3dSvj/8JZT2S2yR91mspqM6MyOpKl5lrhHsZa8=' 'sha256-JfJ82reKxtqugVbfRGw/O/1x1Lm1I09rHueXSwvbRws=' 'sha256-BbV1i75oYRtLtfDWs7tnA8QLF5EOO1dVHKL0prVd/fQ=' 'sha256-3woF8BZ54TeXM+czaH3aXoaJsVpiamuAKFsXDykAR/Q=' 'sha256-vIfNcKb8ixJg1cfJIoNNYjWcm0lezj1/XpUNFiZyVsU=' 'sha256-cLsHUHFgT/VGX04cZrJ9xgm4HbzTR7ptutkxK+7BlMk=' 'sha256-BwU8jMnQYUhjOpsDVABpfddV/DlP1ZYrFcTumYw7x54=' 'sha256-wz6ika9i3WU3bpUPdhYDZeO/NrDQniDyiscN0LWnyaY=' 'sha256-3RIGhhApBii1KY+aW1xk7kFyoQY8vSVE5DfT7E9SJUc=' static.licdn.com static-exp1.licdn.com static-exp2.licdn.com static-exp3.licdn.com platform.linkedin.com platform-akam.linkedin.com platform-ecst.linkedin.com platform-azur.linkedin.com snap.licdn.com www.google.com/recaptcha/enterprise.js www.gstatic.com/recaptcha/releases/ www.googletagmanager.com/gtag/js www.googletagmanager.com/gtag/destination googleads.g.doubleclick.net/pagead/viewthroughconversion/ merchantpool1.linkedin.com/mdt.js; img-src data: blob: * 'self' *.licdn.com android-webview-video-poster:; font-src data: * 'self' *.licdn.com; style-src 'self' 'unsafe-inline' static.licdn.com static-exp1.licdn.com static-exp2.licdn.com static-exp3.licdn.com; media-src 'self' *.licdn.com *.lynda.com; worker-src 'self' blob: static.licdn.com static-exp1.licdn.com static-exp2.licdn.com static-exp3.licdn.com; frame-src 'self' www.youtube.com/embed/ www.youtube-nocookie.com/embed/ lnkd.demdex.net smartlock.google.com accounts.google.com player.vimeo.com *.linkedin.com www.slideshare.net *.megaphone.fm *.omny.fm *.sounder.fm msit.powerbi.com app.powerbi.com linkedin.github.io *.licdn.com *.adnxs.com acdn.adnxs-simple.com radar.cedexis.com edge-auth.microsoft.com flo.uri.sh play.vidyard.com www.google.com/recaptcha/ aat-acr-web-prod.azurewebsites.net *.fls.doubleclick.net www.googletagmanager.com td.doubleclick.net li.protechts.net *.xlgmedia.com *.px-cloud.net merchantpool1.linkedin.com; frame-ancestors 'self' *.www.linkedin.com:*; manifest-src 'self'; report-uri https://www.linkedin.com/security/csp?f=gg
X-Frame-Options
[ STRONG ]
// Prevents clickjacking by blocking iframe embedding from other origins.
sameorigin
X-Content-Type-Options
[ STRONG ]
// Prevents MIME sniffing. Should be 'nosniff'.
nosniff
Referrer-Policy
[ MISSING ]
// Controls how much referrer info is leaked when navigating away.
// missing — add this header to improve security
Permissions-Policy
[ MISSING ]
// Restricts which browser features (camera, mic, etc.) the page can use.
// missing — add this header to improve security