Security headers help browsers enforce safer behavior when visitors load your WordPress site. They are not a replacement for patching, secure coding, vulnerability management, or access control, but they are an important part of a WordPress security audit.

A WordPress security scanner should review headers because missing or weak headers can increase exposure to clickjacking, mixed content, data leakage, browser feature abuse, and script-related risk.

Aegisify Audit’s DAST-style workflows include header and public exposure checks as part of a broader WordPress security audit.

Why Security Headers Matter

Browsers make security decisions based on headers returned by the server. These headers can help define:

• Whether the site should only use HTTPS
• Whether the page can be framed
• Which scripts are allowed
• How much referrer information is sent
• Which browser features are allowed
• Whether MIME sniffing is blocked

Security headers are especially important for:

• Login pages
• Checkout pages
• Account pages
• Admin-adjacent workflows
• Membership portals
• Customer dashboards
• WooCommerce stores

WordPress Security Headers Checklist

1. Strict-Transport-Security

HSTS tells browsers to use HTTPS for future requests.

Check:

• Is HTTPS enabled?
• Is HSTS present?
• Is the max-age appropriate?
• Are subdomains included only when safe?
• Is preload considered only when the site is ready?

Do not add HSTS blindly. If a site has mixed content or subdomain issues, a bad rollout can create problems.

2. Content-Security-Policy

CSP helps control which scripts, styles, frames, images, and other resources can load.

Check:

• Is CSP present?
• Is it report-only or enforced?
• Are unsafe-inline or unsafe-eval used?
• Are third-party scripts required?
• Does WooCommerce checkout still work?
• Do analytics, ads, chat widgets, and payment providers still work?

CSP is powerful but easy to break. Start carefully and test.

3. X-Frame-Options or Frame-Ancestors

Frame protections help reduce clickjacking risk.

Check:

• Is X-Frame-Options present?
• Is CSP frame-ancestors used?
• Are there legitimate iframe requirements?
• Are payment or embedded workflows affected?

4. X-Content-Type-Options

This header can help prevent MIME sniffing.

Recommended value:

• nosniff

5. Referrer-Policy

Referrer-Policy controls how much URL information is sent to other sites when users click links.

Review:

• Is the policy present?
• Does it reduce unnecessary leakage?
• Does it preserve needed analytics?

Common balanced option:

• strict-origin-when-cross-origin

6. Permissions-Policy

Permissions-Policy controls access to browser features such as camera, microphone, geolocation, and payment-related capabilities.

Review:

• Which features does the site need?
• Are unnecessary features disabled?
• Do checkout or embedded tools require anything special?

7. Cross-Origin Headers

Some advanced sites may need cross-origin policies. These should be reviewed carefully because they can affect embeds, scripts, and application behavior.

Security Headers Are Not Enough

Headers are important, but they do not fix:

• Vulnerable plugins
• Weak admin passwords
• Exposed REST routes
• Broken access control
• Malware
• Unsafe custom code
• Outdated themes
• Bad file permissions
• Misconfigured webhooks
• Leaked debug logs

That is why Aegisify Audit treats headers as one part of a broader WordPress security audit.

How Aegisify Audit Helps

Aegisify Audit helps review:

• Security headers
• HTTPS/TLS signals
• Public exposure
• Login surface
• REST/API exposure
• Install artifacts
• Debug log exposure
• DAST-style findings
• Vulnerability scan context
• Reports and remediation priorities

This gives site owners a better path than simply adding random headers from a blog post.

Implementation Tips

• Test headers in staging first
• Roll out CSP in report-only mode when needed
• Verify WooCommerce checkout
• Verify payment gateways
• Verify analytics and tag managers
• Verify embedded videos/maps/chat tools
• Retest after deployment
• Include header review in recurring audits

FAQ

Do security headers make WordPress secure?

No. They help reduce certain browser-facing risks, but they are only one layer.

Should every site use the same CSP?

No. CSP should match the site’s scripts, styles, integrations, and business workflows.

Can Aegisify Audit detect missing headers?

Aegisify Audit’s scan workflows include header review as part of public exposure and DAST-style checks.