Missing X-Frame-Options header
What this means
The response does not send X-Frame-Options, so the page can be embedded in a frame on another site, which enables clickjacking.
How to fix it
Send X-Frame-Options: SAMEORIGIN (or DENY if the page is never framed), or the equivalent CSP frame-ancestors directive.
Fix effort
This check is auto-fixable: the change can be written and validated automatically, so CrawlX can open it as a pull request for review.
Authoritative source
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