Remove wildcard sources from script-src on Apache
Why it matters
A script-src that allows *, http:, https: or data: lets an attacker load a script from any server they control, so the policy does not stop script injection. List the exact hosts you use, or switch to nonces with 'strict-dynamic'.
Staged change. Do this in stages and check each one before the next, so a mistake does not break your site or your mail.
The fix
- Stage 1: add a report-only copy of the policy with explicit hosts next to the current Header line and reload.
- Stage 2: replace the wildcard in the enforced Content-Security-Policy and remove the report-only line.
apache
Header always set Content-Security-Policy-Report-Only "script-src 'self' https://scripts.vendor.example; object-src 'none'; base-uri 'self'" Related
- Reported by the Content-Security-Policy check
- Add a Content-Security-Policy
- Enforce the report-only Content-Security-Policy
- Send the Content-Security-Policy as an HTTP header
- Restrict where scripts can load from
- Replace 'unsafe-inline' scripts with nonces or hashes
- Remove 'unsafe-eval' from script-src
- Set object-src to 'none'
- Add base-uri to the Content-Security-Policy
- Reduce reliance on inline styles
- Fix the Content-Security-Policy syntax
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