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Security report for controller.com

Controller · Transportation · United States

Low risk. 5 critical or high findings in Security headers and SSL/TLS.

Security score

76/100

Risk levelLow

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

Controller.com is a leading online marketplace specializing in the sale of new and used aircraft, including jets, turboprops, piston airplanes, helicopters, and related parts and equipment. The platform serves a broad audience of aircraft buyers, sellers, dealers, and aviation professionals, providing comprehensive listings across multiple aircraft categories and supporting services such as financing and dealer portals. The site is owned by Sandhills Global, a reputable parent company, which enhances its market credibility and operational scale. Technically, the website employs modern web technologies including React and Material UI, supported by Google Tag Manager and Analytics for performance monitoring and marketing. The site demonstrates good mobile optimization, accessibility, and SEO practices, contributing to a positive user experience. Advertising is managed primarily through Google AdSense and related networks, with transparent partner links and cross-promotions. From a security perspective, the site enforces HTTPS and employs some security best practices, though it lacks explicit security headers like Content-Security-Policy and X-Frame-Options. Privacy compliance is basic, with no explicit privacy or cookie policies detected in the provided content. The WHOIS data is unavailable or privacy protected, which slightly reduces transparency but does not detract significantly from the site's legitimacy given its professional presentation and parent company association. Overall, Controller.com presents a professional, trustworthy, and well-maintained platform for aircraft sales, with moderate room for improvement in privacy disclosures and security header implementation. Strategic enhancements in these areas would further strengthen its security posture and compliance standing.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 100 · Low
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

5 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. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching controller.com

This scan found 16 issues across 5 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

€25per month

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

Email alerts on material changes and an exportable JSON history of every change.

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Full report

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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
57
Security headers
20
Email security
95
DNS health
85
Network security
100
GDPR outside view
100
Average
76

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

Controller.com holds a strong market position as a specialized e-commerce platform in the transportation sector, focusing on aviation. Its competitive advantage lies in its extensive aircraft listings, diverse category coverage, and integration with financing and dealer services. The business model is primarily marketplace-driven, generating revenue through listings, advertising, and ancillary services. The target customer segments include private buyers, commercial operators, military and agricultural sectors, and aviation dealers. The association with Sandhills Global provides operational support and brand trust. Growth indicators include active advertising partnerships and a broad range of aircraft categories. The partnership ecosystem includes financing providers and cross-promotional sites, enhancing service offerings and customer reach.

Security posture

The website demonstrates a moderate to good security maturity level, with HTTPS enforced and no visible exposure of sensitive data. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options indicates potential areas for improvement to mitigate risks like clickjacking and cross-site scripting. Privacy compliance is minimal, lacking visible privacy and cookie policies, which may pose regulatory risks under GDPR and similar frameworks. Incident response and security policy disclosures are not found, suggesting limited transparency in security governance. The use of Google Analytics and Tag Manager implies data collection practices that should be clearly communicated to users. Overall, the security posture is adequate for the business type but would benefit from enhanced policy transparency and technical controls.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies to improve GDPR compliance and user trust.
  2. Add explicit security headers such as Content-Security-Policy and X-Frame-Options to strengthen defense against common web attacks.
  3. Publish a security policy and incident response contact information to enhance transparency and preparedness.
  4. Review and tighten Referrer-Policy settings to reduce information leakage.
  5. Regularly audit third-party scripts and advertising integrations to minimize security and privacy risks.

Contact details published on the site

Addresses
Legal name
Controller®
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Controller
Description
Controller.com offers easy access to thousands of aircraft for-sale listings, as well as parts, components, and salvage aircraft. Buyers can find all categories of new and pre-owned aircraft for sale on Controller.com while sellers can consign theirs, including jets, turboprop aircraft, piston aircraft, light sport airplanes, piston and turbine helicopters, piston and turbine amphibious aircraft or floatplanes, and experimental or homebuilt aircraft. The site includes listings for private, commercial, military, agricultural, and other aircraft markets, as well as equipment such as fuel tanks, power units, hangars, and de-ice equipment.
Key services
Aircraft listings, Parts and components listings, Salvage aircraft listings, Dealer portal, Financing options
Content quality
excellent
Branding
consistent

Technology

Stack
React, Material UI, Google Tag Manager, Google Analytics, Font Awesome, Google Fonts, Typekit Fonts
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure cookies (implied)
  • Consent management for security consent

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google AdSense, DoubleClick
Transparency
good

Site quality

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

Key observations

  1. Website is a professional marketplace for aircraft sales with extensive listings and categories.
  2. Strong branding and consistent design aligned with parent company Sandhills Global.
  3. Use of modern web technologies and analytics tools.
  4. No privacy or cookie policies explicitly found on the homepage HTML content.
  5. No explicit security or incident response policies published.
  6. WHOIS data is missing or privacy protected, reducing transparency.
  7. Advertising is primarily via Google AdSense and related networks.
  8. No adult or questionable content detected; content is safe for general audiences.
Technical notes

Notes

The website is built on a modern React framework with Material UI components, ensuring a responsive and accessible user interface. It leverages Google Fonts and Typekit for typography and integrates Google Tag Manager and Analytics for tracking and marketing. The site uses asynchronous loading for styles and scripts to optimize performance. Advertising is managed via Google AdSense and DoubleClick, with safe frame implementations. The site shows good mobile optimization and accessibility features, including ARIA roles and keyboard navigation support. However, there is no detected CMS, and hosting provider details are not evident from the content. Performance is moderate, with potential improvements in caching and security header implementation to enhance speed and security.
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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