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Security report for opentable.com

OpenTable · Hospitality · United States

Partial score · DNS & email only

72/100

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

OpenTable operates as a leading online restaurant reservation platform, providing diners with the ability to book tables in real-time at fine dining establishments globally. The platform also offers restaurant management software solutions, supporting restaurateurs with reservation management, marketing, and event planning. OpenTable's market position is strong, supported by a comprehensive digital presence and a large user base. The website is professionally designed with excellent content quality, clear navigation, and mobile optimization, reflecting a mature digital infrastructure. Technically, the site leverages modern web technologies including React, Apollo GraphQL, and integrates multiple analytics and tracking tools such as Mixpanel and Google Tag Manager. Security posture is robust with HTTPS enforcement and standard security headers, though explicit security policies and incident response information are not publicly detailed. Privacy compliance is well addressed with comprehensive privacy and cookie policies and consent mechanisms. The absence of WHOIS data reduces transparency but does not detract from the overall legitimacy of the brand. Strategic recommendations include publishing detailed security policies and incident response contacts to enhance trust and compliance visibility.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
Checks completed
6of 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

1 finding rated critical or high. Fix these first.

  1. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

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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
0
Email security
87
DNS health
85
Network security
100
GDPR outside view
88
Average
72

Not counted

  • Security headers: did not complete in this scan.
  • 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

OpenTable's business model centers on providing a seamless online booking experience for diners while offering restaurants tools to manage reservations and customer engagement. The company targets both consumers seeking dining experiences and restaurateurs requiring operational software. Revenue streams likely include subscription fees from restaurants, commissions on bookings, and marketing services. The platform's extensive international reach and localized sites indicate a broad market presence. Partnerships with mobile app stores and integration with marketing and analytics platforms demonstrate a sophisticated ecosystem. Growth indicators include continuous feature enhancements and expansion into private dining and ticketed experiences. The company maintains a strong brand with consistent messaging and trust signals such as privacy policies and social media engagement.

Security posture

OpenTable exhibits a mature security posture with HTTPS enforced site-wide and implementation of key security headers like Content-Security-Policy and Strict-Transport-Security. The site uses CSRF tokens and avoids exposing sensitive data in the HTML. However, there is no publicly available security policy or vulnerability disclosure program, which are best practices for transparency and incident management. No vulnerabilities or malware indicators were detected in the content. Privacy policies are comprehensive and GDPR compliant, indicating good data protection practices. Incident response readiness and security culture indicators are not visible, suggesting an area for improvement to enhance stakeholder confidence.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance frameworks.
  2. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide clear contact information for security incidents or abuse reports to improve incident response transparency.
  4. Regularly audit and update third-party libraries and tracking tools to mitigate potential vulnerabilities.
  5. Enhance user trust by including certifications or compliance badges related to data protection and security.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
OpenTable
Description
Book online, read restaurant reviews from diners, and earn points towards free meals. OpenTable is a real-time online booking network for fine dining restaurants.
Key services
Online restaurant reservations, Restaurant management software, Dining rewards program
Content quality
excellent
Branding
consistent

Technology

Stack
Apollo GraphQL, Mixpanel analytics, Google Tag Manager, Google Maps API, OneTrust for cookie consent, Adjust for mobile app tracking
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of CSRF tokens
  • No visible vulnerable libraries

Analytics and tracking

Services
Mixpanel, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Mixpanel, Adjust
Marketing tools
Mixpanel
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and multiple international localized versions.
  2. Strong SEO and metadata implementation including Open Graph and JSON-LD structured data.
  3. No contact emails or phone numbers explicitly found in the HTML content.
  4. Social media presence is strong with official accounts linked.
  5. No visible security.txt or explicit security incident response information.
  6. Privacy and cookie policies are present and comprehensive with consent mechanisms.
  7. No suspicious or malicious content detected.
  8. WHOIS data is unavailable or protected, which is common for large brands but reduces transparency.
Technical notes

Notes

The website is built on a modern technology stack featuring React and Apollo GraphQL, enabling dynamic and responsive user experiences. Integration with analytics platforms such as Mixpanel and Google Tag Manager supports data-driven decision-making. The site is optimized for performance with preconnect and dns-prefetch hints for critical external resources. Mobile optimization is excellent, ensuring accessibility across devices. The absence of a detected CMS suggests a custom or proprietary platform. Hosting details are not explicitly available but the use of CDN domains indicates a distributed content delivery approach. Technical risks are minimal, with no visible outdated libraries or broken elements. Opportunities exist to improve technical documentation and security transparency to align with enterprise best practices.
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

Earlier scans of this domain

  1. 75/100Medium3 findings · partial scanView report
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