CSP allows unsafe-inline scripts: what it is, why it matters, and how to fix it
The Content-Security-Policy includes 'unsafe-inline' in the script-src directive, which significantly weakens CSP protection against cross-site scripting (XSS) attacks.
Where this fits: security in SEO
Why csp allows unsafe-inline scripts hurts your rankings
The primary purpose of CSP is to prevent XSS attacks by controlling which scripts can execute. Using 'unsafe-inline' negates most of this protection, as attackers who find an injection point can execute arbitrary inline scripts. This leaves your site nearly as vulnerable as having no CSP at all.
This is a medium-severity issue: individually modest, but it compounds — dozens of medium issues across hundreds of pages add up to a real quality deficit in how search engines assess the site.
How to fix it
Replace 'unsafe-inline' with nonce-based or hash-based script allowlisting. Generate a unique nonce for each page load and add it to both the CSP header and each inline script tag. Alternatively, move inline scripts to external files.
# Use nonces instead of unsafe-inline
Content-Security-Policy: script-src 'self' 'nonce-abc123'
<script nonce="abc123">/* your code */</script>Frequently asked questions
What does "CSP allows unsafe-inline scripts" mean?
The Content-Security-Policy includes 'unsafe-inline' in the script-src directive, which significantly weakens CSP protection against cross-site scripting (XSS) attacks.
Why does csp allows unsafe-inline scripts matter for SEO?
The primary purpose of CSP is to prevent XSS attacks by controlling which scripts can execute. Using 'unsafe-inline' negates most of this protection, as attackers who find an injection point can execute arbitrary inline scripts. This leaves your site nearly as vulnerable as having no CSP at all.
How do I fix csp allows unsafe-inline scripts?
Replace 'unsafe-inline' with nonce-based or hash-based script allowlisting. Generate a unique nonce for each page load and add it to both the CSP header and each inline script tag. Alternatively, move inline scripts to external files.
How serious is this issue?
This is a medium-severity issue: individually modest, but it compounds — dozens of medium issues across hundreds of pages add up to a real quality deficit in how search engines assess the site. It belongs to the security family of checks.
How do I find every page affected by this on my site?
Run a free Dr Urls audit: it crawls your site, detects csp allows unsafe-inline scripts on every affected page, shows example URLs, and generates a ready-to-use fix task. Re-scan after fixing to verify the issue is gone.
Does your site have this issue?
A free Dr Urls audit crawls your site, finds every page affected by csp allows unsafe-inline scripts, and hands you a ready-made fix task.
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