Missing or permissive X-Frame-Options header
Any site can load yours inside an invisible frame, overlay its own buttons, and capture the clicks your users think they are giving you — clickjacking.
Why it matters
Any site can load yours inside an invisible frame, overlay its own buttons, and capture the clicks your users think they are giving you — clickjacking. The usual targets are the buttons that change something: delete, approve, pay. Modern browsers honour a CSP frame-ancestors directive instead, so this only matters if you have neither.
How ShipReady detects it
Shared tables and rules for the two halves below. Split because this check was a hybrid: nine rules read the headers of a response we already have, which genuinely differ between routes, while missing-https-redirect probes the http:// equivalent of the origin — one fact, and running it per page would issue the same request ten times.
Detection is deterministic. ShipReady reports this only when it observes the condition directly, and prefers to miss a real problem over inventing one. Rule version 1.3.0.
How to fix it
This is the prompt ShipReady puts in your report — written to be pasted straight into Cursor, Claude Code, or whichever assistant built the app.
Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking.
Frequently asked questions
- What does "Missing or permissive X-Frame-Options header" mean?
- Any site can load yours inside an invisible frame, overlay its own buttons, and capture the clicks your users think they are giving you — clickjacking.
- How serious is it?
- ShipReady rates this medium. Fix soon. Meaningfully weakens a defence or degrades how the site works.
- How do I fix it?
- Paste the fix prompt on this page into Cursor, Claude Code or your AI editor. It is the same prompt ShipReady puts in your report.
- Can I check my own site?
- Yes — ShipReady scans up to ten pages of any public site for free and reports this alongside every other check.
Related checks
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