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Security report for doctolib.de

Doctolib GmbH · Healthcare · Germany

High risk. 17 critical or high findings in Network security, Security headers and 2 other checks.

Security score

49/100

Risk levelHigh

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

Doctolib GmbH operates a leading online healthcare appointment booking platform primarily serving Germany, with extensions in France and Italy. The platform enables patients to book doctor and therapy appointments easily and offers video consultation services. The company targets both patients and healthcare professionals, providing a comprehensive digital healthcare management solution. Technically, the website employs modern web technologies including React, Sentry for error monitoring, Datadog for performance analytics, and Cloudflare for hosting and security. The platform is mobile-optimized and integrates consent management and captcha services to ensure privacy and security compliance. Security posture is strong, supported by multiple ISO and TÜV certifications, secure cookie handling, and HTTPS enforcement. No critical vulnerabilities or exposed sensitive data were detected. Overall, the website is professional, trustworthy, and compliant with GDPR and other privacy regulations, although it lacks a publicly visible vulnerability disclosure policy and explicit incident response contact. Strategic recommendations include publishing a security incident response policy and adding a security.txt file to enhance transparency and trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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

17 findings rated critical or high. Fix these first.

  1. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: Telnet

      Port 23 (Telnet) is publicly accessible - Telnet - Unencrypted remote access

      What to do: Immediately restrict access to Telnet using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection
    • Critical

      Critical Service Exposed: SMB

      Port 445 (SMB) is publicly accessible - SMB - Windows file sharing, high risk

      What to do: Immediately restrict access to SMB using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection
    • Critical

      Critical Service Exposed: MSSQL

      Port 1433 (MSSQL) is publicly accessible - MSSQL - Database server

      What to do: Immediately restrict access to MSSQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection
    • Critical

      Critical Service Exposed: Oracle

      Port 1521 (Oracle) is publicly accessible - Oracle - Database server

      What to do: Immediately restrict access to Oracle using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection
    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

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  • TLS certificates and expiry
  • DNS records
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  • 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
80
Security headers
55
Email security
100
DNS health
70
Network security
0
GDPR outside view
85
Average
65
After the cap
49

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 · found on this site
  • 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

Doctolib holds a strong market position as a leading healthcare appointment platform in Europe, leveraging a SaaS business model focused on healthcare providers and patients. Its revenue streams likely include subscription services for practitioners and possibly transaction fees for appointment bookings. The company maintains a robust partnership ecosystem with regional sister sites and integrates with major CRM and support platforms. Growth indicators include extensive service offerings such as telehealth and secure document sharing. The company demonstrates a mature digital presence with consistent branding and comprehensive legal and privacy documentation.

Security posture

The security maturity level of Doctolib is high, evidenced by ISO 27001 and 27701 certifications, BSI C5 compliance, and TÜV data privacy certifications. The website enforces HTTPS, uses secure cookie flags, and implements multiple security headers. Monitoring tools like Sentry and Datadog are in place for real-time error and performance tracking. No vulnerabilities or exposed sensitive data were found in the analysis. However, the absence of a public vulnerability disclosure policy and incident response contact slightly reduces transparency. The company appears well-prepared for GDPR compliance and data protection, but could improve incident response readiness and communication.

Recommendations

  1. Publish a clear security incident response policy and provide a dedicated contact email for security issues.
  2. Implement and publish a security.txt file to facilitate responsible vulnerability disclosure.
  3. Regularly review and audit third-party scripts and dependencies to mitigate potential vulnerabilities.
  4. Enhance transparency by providing more detailed information about data retention policies and incident handling.
  5. Maintain and update certifications and security best practices to sustain trust and compliance.

Contact details published on the site

Addresses
Legal name
Doctolib GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Doctolib GmbH
Description
Online platform for booking doctor and therapy appointments easily in Germany and other European countries.
Key services
Online appointment booking, Video consultation, Patient and practitioner account management, Secure document sharing
Content quality
excellent
Branding
consistent

Technology

Stack
React, Sentry, Datadog RUM, Cloudflare, Didomi Consent SDK, FriendlyCaptcha, Stripe, Adyen, TokBox
Frameworks
React
Platforms
Web, Mobile (iOS and Android apps referenced)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Secure cookie flags (SameSite=None; Partitioned for iframe cookies)
  • Use of security headers
  • Use of security monitoring tools (Sentry, Datadog)
  • ISO and TÜV certifications
  • Secure document sharing with encryption

Analytics and tracking

Services
Datadog RUM, Sentry, Screeb
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Datadog RUM, Sentry, Screeb
Marketing tools
Didomi Consent SDK, FriendlyCaptcha, WalkMe
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 and functional.
  2. Strong security posture with multiple certifications and security headers.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. Clear business and contact information provided.
  5. Use of modern web technologies and analytics tools.
  6. No signs of suspicious or malicious content.
  7. Good SEO and accessibility practices observed.
  8. Social media presence on major platforms.
  9. No vulnerability disclosure or incident response contact found publicly.
Technical notes

Notes

The website is built on a modern React framework with extensive use of third-party services for error monitoring (Sentry), performance analytics (Datadog), and consent management (Didomi). Hosting is provided via Cloudflare, ensuring robust security and performance. The site is well-optimized for mobile devices and includes accessibility and SEO best practices. The use of multiple security headers and secure cookie configurations indicates a mature technical infrastructure. Opportunities exist to further modernize by consolidating third-party scripts and enhancing incident response automation.
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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