Threat Level: green Handler on Duty: Xavier Mertens

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


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This is a continuation of work started by Brough Davis as part of his software security project for his Masters in Information Security Engineering. The main goal of this project is to find how many sites use security relevant headers, like for example the X-XSS-Protection or X-Frame-Options headers.

Below you will find a table/histogram showing how many times we found each header (security relevant or not). We access the index page of each site using a "head" request. The list of sites is derived from Alexa's Top 1 Million sites. We try to poll as many sites as possible each day.

As we collect more data, we will plot changes over time.



All Headers Active In The Past Month
Header Popularity
X-Cache
Set-Cookie
Date
Connection
Content-Type
X-Cache-Lookup
Vary
Server
Cache-Control
Via
X-Amz-Cf-Pop
X-Amz-Cf-Id
X-Edge-Origin-Shield-Skipped
Content-Length
X-Frame-Options
X-Content-Type-Options
ETag
Strict-Transport-Security
Expires
X-Powered-By
Link
Last-Modified
Accept-Ranges
Age
Content-Security-Policy
Accept-CH
X-Xss-Protection
Referrer-Policy
Pragma
X-XSS-Protection
Access-Control-Allow-Origin
Expect-CT
CF-Cache-Status
CF-RAY
Content-Language
X-Download-Options
X-Request-Id
Report-To
NEL
Alt-Svc
Access-Control-Allow-Methods
X-UA-Compatible
X-DNS-Prefetch-Control
Access-Control-Allow-Headers
EagleId
X-Cache-Hits
Content-Security-Policy-Report-Only
X-Varnish
X-Amz-Version-Id
X-Permitted-Cross-Domain-Policies
X-Envoy-Upstream-Service-Time
X-Served-By
Access-Control-Allow-Credentials
Accept-CH-Lifetime
X-Adblock-Key
P3P
X-Runtime
X-Generator
Permissions-Policy
X-Amz-Request-Id
X-Amz-Id-2
X-Cacheable
X-Dispatcher
X-Vhost
X-Drupal-Cache
X-Drupal-Dynamic-Cache
X-Meli-Trace-Platform
X-Meli-Trace-Site
X-Meli-Trace-Bu
X-Request-Device-Id
X-D2id
X-Content-Type
X-Element-Page-Cache
X-Navigation-Version
X-AspNet-Version
X-Timer
Feature-Policy
Server-Timing
Access-Control-Max-Age
Status
X-Backend
X-Cache-Status
X-Dns-Prefetch-Control
X-Content-Security-Policy
X-Iinfo
Access-Control-Expose-Headers
X-Via
X-Server
X-Proxy-Cache
X-CDN
Content-Encoding
X-Varnish-Cache
X-Ws-Request-Id
X-Turbo-Charged-By
X-Amz-Server-Side-Encryption
X-Amzn-Trace-Id
Cache-Tag
Xkey
X-RemovedCookies
X-WebKit-CSP
X-ProcessESI
X-AspNetMvc-Version
Timing-Allow-Origin
X-Amz-Rid
Request-Id
X-MS-InvokeApp
X-SharePointHealthScore
SPRequestGuid
X-AH-Environment
SPIisLatency
SPRequestDuration
X-Aspnet-Version
Cf-Edge-Cache
Apigw-Requestid
X-Proxy-Build
X-Timing-Wait
Selected-Fe
AMP-Access-Control-Allow-Source-Origin
X-LiteSpeed-Cache
X-Node
X-Page-Speed
X-Redirect
X-Amz-Replication-Status
X-Cacheable-TTL
Front
CloudFront-Viewer-Country
X-Host
X-Robots-Tag
MicrosoftSharePointTeamServices
X-Mly-Id
Xet-Cookie
Fastly-Restarts
Grace
X-Mod-Pagespeed
X-OneAgent-JS-Injection
X-Device
Cf-Apo-Via
X-SRCache-Fetch-Status
X-SRCache-Store-Status
X-Correlation-Id
Expect-Staple
X-SRCache-Key
X-Rq
X-Provided-By
Protected
X-Ruxit-JS-Agent
X-Cache-Group
Request-Context
We-Hiring
X-Readtime
X-Backend-Server
X-Clientip
X-Hl-Ver
X-Azure-Ref
X-Viewer-Country
Countrycode
Mail-Subject
X-Pantheon-Styx-Hostname
X-Styx-Req-Id
X-Server-Powered-By
X-Age
X-Cache-Time
X-User
X-CST
X-Server-Id
X-Cache-TTL
Content-Location
X-Amz-Apigw-Id
X-Amzn-RequestId
X-Ua-Compatible
X-HW
Allow
X-Status
Liferay-Portal
X-Debug-Info
X-Oneagent-Js-Injection
X-Ruxit-Js-Agent
X-Powered-By-Plesk
X-Language
X-Country-Code
X-T
X-Trace
Odigeo-Trace-Id
X-Vcl-Version
Cf-Railgun
Resin-Trace
X-Cdn
X-B3-TraceId
P3p
X-ID
X-Server-ID
X-Generated-By
X-Yottaa-Optimizations
Request-ID
X-Envoy-Decorator-Operation
X-Yottaa-Metrics
X-Template
Pinterest-Version
Pinterest-Generated-By
AKAMAI-GRN
X-Pinterest-Rid
X-UA-Device
X-Akam-SW-Version
MRF-Tech
Mrf-Cache-Status
X-B3-TraceId-Primal