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Security report for hartzellprop.com

Hartzell Propeller Inc. · Transportation · United States

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

62/100

Risk levelMedium

0–100, higher is better. How it is calculated

Hartzell Propeller Inc. is a well-established leader in the aircraft propeller manufacturing industry, with a history dating back to 1997 and a domain age since 1997 supporting its longstanding market presence. The company offers a comprehensive range of products and services including propeller systems, aftermarket products, overhaul and repair services, and technical support, targeting pilots, aircraft owners, modifiers, repair facilities, and government sectors. The website reflects a professional and consistent brand image with good content quality and clear navigation, supported by active social media engagement and customer testimonials that enhance trustworthiness. Technically, the website is built on WordPress with a modern tech stack including jQuery, Google Tag Manager, and SEO plugins like Yoast. Hosting and DNS services are provided via Cloudflare, ensuring good performance and security. The site is mobile optimized and includes accessibility features, although some security headers are not explicitly detected. The SSL configuration is good, but DNSSEC is not enabled, representing a minor security gap. From a security and compliance perspective, the site enforces HTTPS and has domain transfer protections in place. However, it lacks visible privacy and cookie policies, incident response information, and vulnerability disclosure mechanisms, which are important for GDPR compliance and user trust. Analytics and advertising tools such as Google Analytics and Facebook Pixel are used, indicating moderate user tracking without explicit consent mechanisms. Overall, the website is professional and credible with a strong business foundation but would benefit from enhanced privacy compliance and security transparency to improve its security posture and regulatory adherence.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

8 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

Need hands-on remediation? Email guard@offseq.com

Keep watching hartzellprop.com

This scan found 26 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
72
Security headers
15
Email security
75
DNS health
75
Network security
100
GDPR outside view
35
Average
62

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Hartzell Propeller Inc. holds a strong market position as a global leader in aircraft propeller systems, leveraging nearly a century of industry experience. The company’s business model focuses on manufacturing, servicing, and supporting aircraft propellers and related products, generating revenue through product sales, aftermarket services, training, and fleet enhancement programs. Its target customers include general aviation pilots, aircraft owners, modifiers, repair facilities, and government agencies involved in UAV and military applications. The company maintains a robust partnership ecosystem with related aviation and aerospace service providers, enhancing its market reach and service capabilities. Growth indicators include active content updates, new product launches, and engagement in advanced air mobility sectors. The website’s integration with multiple partner domains and merchandise stores reflects a diversified business approach and strong brand presence.

Security posture

The website demonstrates a moderate to good security maturity level with enforced HTTPS, domain transfer protection, and use of Cloudflare DNS services. However, the absence of DNSSEC, explicit security headers, and published security policies or incident response contacts indicates areas for improvement. The lack of privacy and cookie policies also presents compliance gaps, particularly under GDPR. No critical vulnerabilities or exposed sensitive data were detected in the content. The use of third-party analytics and advertising scripts introduces moderate user tracking, but without clear consent mechanisms. Overall, the security posture is adequate for business operations but requires enhancements in transparency, policy publication, and DNS security to strengthen trust and compliance.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish comprehensive privacy and cookie policies with clear GDPR compliance statements.
  3. Implement and publicly disclose a security policy and incident response contact information.
  4. Add or verify security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  5. Introduce explicit cookie consent mechanisms to comply with privacy regulations and improve user trust.

Contact details published on the site

Addresses
Legal name
Hartzell Propeller Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Hartzell Propeller Inc.
Description
Hartzell Propeller Inc. is the global leader in advanced aircraft and airplane propeller design and aircraft and airplane propeller manufacturing technology
Key services
Propeller manufacturing, Propeller overhaul and repair, Technical support, Aftermarket products, Training classes, Product registration
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Google Tag Manager, Google Analytics, Yoast SEO plugin, WordPress, SVG Support plugin, Wunderground Weather Plugin, Gravity Forms Placeholder Support Add-on, SD Mobile Nav plugin
Frameworks
WordPress
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced
  • Domain status clientTransferProhibited
  • Use of Cloudflare DNS

Analytics and tracking

Services
Google Analytics, Facebook Pixel
Tracking level
moderate
Privacy practices
poor

Advertising

Ad networks
StackAdapt
Tracking pixels
Facebook Pixel
Marketing tools
Facebook Pixel, StackAdapt
Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. No explicit privacy or cookie policy found, which is a compliance gap.
  3. Strong branding and consistent professional content.
  4. Multiple social media channels linked, indicating active engagement.
  5. Use of modern web technologies and SEO best practices.
  6. No visible security.txt or vulnerability disclosure information.
  7. Domain WHOIS data is consistent and indicates a legitimate, longstanding business.
Technical notes

Notes

The website is built on a mature WordPress CMS platform with a modern technology stack including jQuery, Google Tag Manager, and SEO optimization via Yoast. Hosting and DNS are managed through Cloudflare, providing CDN and security benefits. The site is mobile responsive and includes accessibility features, although some accessibility enhancements could be made. Performance is moderate with room for optimization. The presence of multiple third-party plugins and scripts indicates some technical debt but also functional richness. There is an opportunity to improve technical security by enabling DNSSEC and adding missing security headers. Overall, the technical infrastructure supports the business well but could benefit from modernization and security hardening.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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