Is HTTPS enough to secure my website?

No. HTTPS only encrypts traffic in transit. It does not stop XSS, clickjacking, MIME-sniffing, or downgrade attacks — those require HTTP security headers like CSP, HSTS, and X-Frame-Options.

How do I check my security headers?

Use securityheaders.com, your browser devtools (Network → response headers), or a Scanly audit — which checks headers alongside SEO, speed, and accessibility in one scan.

Do security headers affect SEO?

Indirectly but meaningfully: Google flags hacked or unsafe sites, Chrome warns on insecure behavior, and compromised sites lose rankings. Headers are cheap insurance for your SEO investment.

You Have SSL but Your Site Still Isn't Secure: 5 Security Headers You're Missing

That padlock in the address bar feels reassuring — but it only means traffic is encrypted in transit. It says nothing about whether your site can be hijacked, iframed, script-injected, or downgraded to HTTP. Those attacks are stopped by HTTP security headers — and most small-business sites are missing all five critical ones.

A free Scanly audit checks your headers in 60 seconds alongside SEO, speed, and accessibility. Here's what it looks for and why each header matters. Primer: complete security headers guide and security audit checklist.

The 5 headers you're probably missing

1. Content-Security-Policy (CSP)

Risk without it: Without CSP, any injected script runs — the #1 enabler of cross-site scripting (XSS) attacks.

Fix: Start with a report-only policy, whitelist your scripts/styles CDNs, then enforce. Example starter: Content-Security-Policy: default-src 'self'; script-src 'self' https://trusted-cdn.com; object-src 'none'.

2. Strict-Transport-Security (HSTS)

Risk without it: Without HSTS, attackers can downgrade visitors from HTTPS to HTTP (SSL-stripping) on first visit or hostile networks.

Fix: Send: Strict-Transport-Security: max-age=31536000; includeSubDomains. Once stable, submit to the HSTS preload list.

3. X-Frame-Options

Risk without it: Without it, attackers can embed your site in an invisible iframe and trick users into clicking (clickjacking).

Fix: Send X-Frame-Options: SAMEORIGIN (or use CSP frame-ancestors). Payment and login pages need this most.

4. X-Content-Type-Options

Risk without it: Without it, browsers "sniff" file types — turning an uploaded file into executable script (MIME-confusion attacks).

Fix: Send X-Content-Type-Options: nosniff on all responses. One line, zero risk of breakage.

5. Referrer-Policy

Risk without it: The default policy leaks full page URLs (with tokens, reset links, private paths) to every third-party you link or embed.

Fix: Send Referrer-Policy: strict-origin-when-cross-origin — full URL stays internal, only the origin goes external.

How to add them (no developer needed)

Cloudflare users: Transform Rules → Modify Response Header — add each header in minutes, no server access needed.
WordPress: plugins like Really Simple Security or Redirection add HSTS, nosniff, frame options, and referrer policy via toggles.
Apache: add Header set … lines in .htaccess. Nginx: add_header …; in the server block.
CSP caution: roll it out in Content-Security-Policy-Report-Only mode first, watch violation reports for a week, then enforce.
Verify with Scanly or securityheaders.com — aim for an A grade.

🔒 Check My Headers Free

Frequently Asked Questions

Can security headers break my site?

Four of the five are zero-risk. Only a strict CSP can block legitimate scripts — which is why you test in report-only mode first. The others (HSTS, nosniff, frame options, referrer policy) are safe to enable immediately.

My host says security is their job — is it?

Hosts handle server patching and firewalls, but response headers are your application's responsibility. No host adds a correct CSP for you — that requires knowing which scripts your site legitimately loads.

Conclusion

SSL encrypts traffic — headers defend the application. Four of these five take minutes to enable with zero breakage risk; roll out CSP in report-only mode and enforce within a week. Verify with a Scanly scan and revisit our security audit checklist to lock down the rest.

You Have SSL but Your Site Still Isn't Secure: 5 Security Headers You're Missing

The 5 headers you're probably missing

1. Content-Security-Policy (CSP)

2. Strict-Transport-Security (HSTS)

3. X-Frame-Options

4. X-Content-Type-Options

5. Referrer-Policy

How to add them (no developer needed)

Frequently Asked Questions

Can security headers break my site?

My host says security is their job — is it?

Conclusion

The padlock isn't the finish line

Read More Articles

My Website Doesn't Appear on Google: 12 Technical Errors Scanly Detects in 60 Seconds

How to Pass Core Web Vitals in 2026 Without Being a Developer

Why Your Site Looks Bad on Mobile and How to Fix It With a Single Scan

Best DeepSeek Harness Plugins Every Developer Should Use in 2026