Matan · Security · Headers

CSP quality

A CSP that allows unsafe-inline, unsafe-eval or * is much weaker than it looks.

Pass condition in our engine: CSP is present and does not include the common weakness patterns we detect.

1. Problem description

We flag common weaknesses: unsafe-inline/eval on script, wildcard sources, missing object-src 'none', missing default-src/script-src. Passing CSP-present but failing this check means you have a header that does not really constrain scripts.

2. Most common causes

  • A blog post’s example policy copied wholesale.
  • GTM requiring unsafe-inline.
  • object-src omitted.

3. How to fix it

  1. Remove unsafe-inline/eval; use nonces or hashes.
  2. Set object-src 'none'.
  3. Avoid * in script-src; list the CDNs you actually use.

Test this check

We fetch only this URL (plus robots.txt / llms.txt at the domain root when the check needs them). We do not crawl the rest of the site like a full report.

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