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Security report for miaxoptions.com

Miami International Holdings, Inc. · Finance · United States

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

66/100

Risk levelMedium

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

Miami International Holdings, Inc. operates a global exchange group providing access to U.S. and international capital markets through multiple electronic exchanges specializing in options, equities, futures, and international securities. The company leverages award-winning technology platforms to deliver superior customer service tailored to financial market participants. The website reflects a mature business with a broad market presence and a diverse product portfolio. Technically, the website is built on Drupal CMS with modern frameworks like Bootstrap and uses advanced charting libraries such as Highcharts. It integrates Google Tag Manager and Analytics for tracking and marketing purposes. The site is mobile-optimized and offers good navigation and content quality, although some accessibility features could be improved. From a security perspective, the site enforces HTTPS and uses secure forms with CSRF tokens. However, there is a lack of visible security headers and no published security or incident response policies. Privacy compliance is minimal with no explicit privacy or cookie policies detected on the main page. The absence of WHOIS data raises concerns about domain registration transparency, which impacts trustworthiness. Overall, the website presents a professional and credible business front but should improve transparency around domain registration and privacy compliance to enhance trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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 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 Cookie Policy found

      GDPR requires clear information about cookie usage

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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. 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 miaxoptions.com

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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
52
Security headers
55
Email security
60
DNS health
75
Network security
100
GDPR outside view
53
Average
66

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

MIAX holds a significant position in the U.S. options and equities markets with expanding international operations, including ownership of The International Stock Exchange and Bermuda Stock Exchange. Its business model centers on operating multiple electronic exchanges and providing proprietary market data and trading platforms. The company targets institutional investors, traders, and brokers, offering differentiated pricing models and technology solutions. Recent press releases indicate active growth and investment, including a $40 million investment from Warburg Pincus. The ecosystem includes subsidiaries like MIAX Futures, LLC and ConvexityShares, LLC, reflecting a diversified financial services group. Strategically, MIAX leverages technology innovation and market share growth to compete with major exchanges like NASDAQ and CBOE. The website content and external links reinforce its market credibility and operational scale.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enforced and secure form handling. However, the absence of key security headers such as Content-Security-Policy, X-Frame-Options, and others reduces defense-in-depth. No evidence of exposed sensitive data or vulnerable libraries was found. The lack of published security policies, incident response contacts, or vulnerability disclosure programs indicates gaps in security governance and transparency. Privacy compliance is also limited, with no cookie consent mechanisms or GDPR-specific disclosures visible. The missing WHOIS data further impacts domain legitimacy assessment. Overall, the security posture is functional but could be significantly improved by adopting best practices in headers, policy publication, and privacy transparency.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with user consent mechanisms to improve GDPR compliance.
  2. Add and enforce security headers such as Content-Security-Policy, X-Frame-Options, and Referrer-Policy to enhance protection against common web attacks.
  3. Publish a clear security incident response policy and provide dedicated contact channels for security issues and vulnerability disclosures.
  4. Verify and update WHOIS domain registration information to ensure transparency and trustworthiness of domain ownership.
  5. Enhance accessibility features and conduct regular security audits to maintain a robust security posture and user experience.

Contact details published on the site

Addresses
Legal name
Miami International Holdings, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Miami International Holdings, Inc.
Description
MIAX has grown from a single options exchange to a global exchange group providing access to U.S. and international capital markets. It operates fully electronic exchanges built on award-winning technology platforms and offers superior customer service tailored to client needs.
Key services
U.S. Options Exchanges (MIAX Options, MIAX Pearl, MIAX Emerald, MIAX Sapphire), U.S. Equities Trading (MIAX Pearl Equities), Futures Trading (MIAX Futures), International Markets Access (Bermuda Stock Exchange), Market Data Products and Services
Content quality
good
Branding
consistent

Technology

Stack
Drupal CMS, Bootstrap CSS, Highcharts JS, Google Tag Manager, Google Analytics
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Secure forms with CSRF tokens
  • No exposed sensitive data in HTML

Analytics and tracking

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

Advertising

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 rich content and navigation
  2. No WHOIS data available, raising domain legitimacy concerns
  3. No explicit privacy or cookie policies found on main page
  4. Contact information is present with phone numbers and addresses
  5. Social media presence is active and linked
  6. Uses modern web technologies and analytics tools
  7. No visible security headers detected in provided data
  8. No vulnerability disclosure or incident response info found
Technical notes

Notes

The website uses Drupal CMS with Bootstrap for responsive design and Highcharts for interactive data visualization. Google Tag Manager and Analytics are integrated for marketing and tracking. The site loads moderate resources and is mobile-optimized with good navigation structure. However, no hosting provider or CDN information was detected. The absence of security headers and privacy policies indicates areas for technical improvement. The site architecture supports scalability and rich content delivery but could benefit from enhanced security configurations and privacy compliance tools.
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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