w3.org

Score 45/100 · scanned 2026-08-04

Content-Security-Policy

w3.org sends an enforcing CSP. It is allowlist-based.

frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests

Directive	Sources
`frame-ancestors`	`'self' https://cms.w3.org/ https://cms-dev.w3.org/`
`upgrade-insecure-requests`	`(empty)`

Headers sent

Header	Value
`strict-transport-security`	`max-age=15552000; includeSubdomains; preload`
`x-content-type-options`	`nosniff`
`server`	`cloudflare`

Critical findings

No script-src and no default-src, so the policy places no restriction on scripts at all.Add script-src with a nonce or hash, or at minimum default-src 'self'.

Re-scan live

This is a snapshot from 2026-08-04. Check it now: