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Security report for opentable.nl

OpenTable · Hospitality · Netherlands

Partial score · DNS & email only

66/100

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

OpenTable.nl is a localized Dutch website of the global OpenTable platform, providing online restaurant reservation services, user reviews, and a points-based rewards system. It targets restaurant diners and restaurateurs in the Netherlands, offering a real-time booking network and restaurant management solutions. The website is well-branded, professionally designed, and optimized for SEO and mobile use. Technically, it leverages modern web technologies including React, Apollo GraphQL, and integrates analytics tools such as Mixpanel and Google Tag Manager. Security posture is strong with HTTPS enforcement, security headers, and CSRF protections, though explicit security policies and incident response contacts are not publicly disclosed. Privacy compliance is robust with clear privacy and cookie policies aligned with GDPR. Overall, the site is trustworthy, accessible, and professionally maintained, supporting a large-scale hospitality business.

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
70
DNS health
70
Network security
100
GDPR outside view
88
Average
66

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 operates as a leading online restaurant reservation platform with a strong market position globally and localized presence in the Netherlands. Its business model centers on facilitating restaurant bookings, collecting diner reviews, and providing restaurant management software. Revenue streams likely include subscription fees from restaurants and possibly commissions. The platform targets both consumers seeking dining experiences and restaurateurs needing reservation management. The website's extensive internal and international linking structure indicates a broad partnership ecosystem and a mature digital presence. The company maintains active social media channels and provides comprehensive legal and support resources, reinforcing its credibility and customer engagement.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, multiple security headers, and CSRF token usage. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of a dedicated security policy page, incident response contact information, or vulnerability disclosure mechanisms suggests room for improvement in transparency and readiness. Privacy policies and cookie consent mechanisms are well implemented, supporting GDPR compliance. The use of third-party analytics and marketing tools is balanced with privacy considerations. Overall, the security posture is strong but could benefit from enhanced communication of security governance and incident handling.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publicize a vulnerability disclosure program or security.txt file.
  4. Enhance transparency by listing the Data Protection Officer contact information.
  5. Regularly review and audit third-party scripts and dependencies for security vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
OpenTable
Description
Reserveer online, lees reviews van andere restaurantbezoekers en verdien punten die je kunt inwisselen voor gratis maaltijden. OpenTable is een realtime online reserveringsnetwerk voor de betere restaurants.
Key services
Online restaurant reservations, Restaurant reviews, Points and rewards system, Restaurant management software
Content quality
excellent
Branding
consistent

Technology

Stack
React (implied by SPA style and script structure), Apollo GraphQL, Mixpanel analytics, Google Tag Manager, OneTrust (cookie consent), Google Maps API
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • CSRF token present
  • No exposed sensitive data in HTML
  • Secure cookies implied
  • No visible vulnerable libraries

Analytics and tracking

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

Advertising

Ad networks
Adjust
Tracking pixels
Mixpanel
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 a professional, well-branded online restaurant reservation platform.
  2. Content is comprehensive and localized for the Netherlands market.
  3. Strong SEO and social media integration.
  4. No signs of malicious or suspicious activity.
  5. Good privacy and cookie policy presence with GDPR compliance.
  6. No explicit security policy or incident response information publicly available.
  7. Use of modern web technologies and analytics tools.
  8. No WAF or blocking detected; site fully accessible.
Technical notes

Notes

The website is built using modern web technologies including React and Apollo GraphQL, indicating a single-page application architecture. It integrates advanced analytics tools like Mixpanel and Google Tag Manager, and uses OneTrust for cookie consent management. The site is optimized for mobile devices and accessibility, with good SEO practices including meta tags, Open Graph, and JSON-LD structured data. Performance is moderate, with preconnect and dns-prefetch hints to optimize resource loading. No CMS or hosting provider details were explicitly found. The technical implementation supports a scalable and user-friendly platform but should maintain vigilance on third-party dependencies and performance tuning.
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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