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Security report for booked4.us

Danubius Expert Zrt. · Technology · Hungary

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

71/100

Risk levelMedium

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

booked4.us is a Hungarian-developed online appointment booking system operated by Danubius Expert Zrt., established in 2013. The platform offers a customizable, automated booking solution tailored for various industries including fitness, healthcare, coaching, beauty, massage, education, and veterinary services. It supports features such as 24/7 booking management, personalized notifications, online payments, and calendar synchronization. The website demonstrates a mature digital presence with modern technologies, mobile optimization, and comprehensive content including FAQs, customer testimonials, and demo calendars. Security posture is strong with HTTPS, GDPR compliance, and cookie consent mechanisms, though explicit security policies and incident response contacts are not publicly detailed. The domain registration data aligns well with the business identity, enhancing trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
80/ 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

6 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. 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

  3. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

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

Keep watching booked4.us

This scan found 22 issues across 6 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

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
77
Security headers
15
Email security
70
DNS health
85
Network security
100
GDPR outside view
80
Average
71

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

The company targets small to medium enterprises across multiple service sectors, leveraging a SaaS model with freemium trials and subscription plans. Its competitive advantage lies in localized Hungarian market focus, multi-industry adaptability, and strong customer support. The presence of partner integrations, such as with Instant System for veterinary services, indicates a strategic ecosystem approach. The business model is supported by clear contact channels, legal documentation, and active marketing via analytics and tracking pixels. Growth indicators include a large user base and monthly booking volumes exceeding 300,000.

Security posture

The website enforces HTTPS and employs domain status locks to prevent unauthorized changes. GDPR compliance is clearly stated with data protection measures and cookie consent. Tracking technologies are used responsibly with user consent. However, the absence of published security policies, incident response contacts, and DNSSEC implementation are areas for improvement. No vulnerabilities or exposed sensitive data were detected in the content. Overall, the security maturity is good but could be enhanced with formalized policies and additional technical controls.

Recommendations

  1. Publish a dedicated security policy page detailing security controls and practices.
  2. Provide clear incident response and abuse contact information on the website.
  3. Enable DNSSEC to improve domain name system security.
  4. Implement and report security headers such as Content-Security-Policy and X-Frame-Options.
  5. Maintain transparency on data retention policies and update privacy documentation accordingly.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Danubius Expert Zrt.
Description
Magyar fejlesztésű online időpontfoglaló rendszer, amely 5 perc alatt beállítható és testre szabható, alkalmas szinte minden vállalkozás számára online naptár és időpontfoglaló funkciókkal.
Key services
Automated 24/7 appointment management, Customizable email and SMS notifications, Online payment integration, Google Calendar synchronization, Multi-industry tailored booking solutions
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Swiper.js, Google Fonts, Google Tag Manager, Facebook Pixel, TikTok Pixel, AWS Route53 DNS
Platforms
Web, iOS (via App Store app link), Android (via Google Play app link)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Domain status includes clientUpdateProhibited, clientTransferProhibited, clientDeleteProhibited, clientRenewProhibited
  • GDPR compliant data handling
  • Cookie consent with accept/decline options

Analytics and tracking

Services
Google Analytics, Facebook Analytics, TikTok Analytics
Tracking level
extensive
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel, TikTok Pixel
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 no blocking detected
  2. Strong GDPR compliance and cookie consent mechanisms
  3. Clear business contact information with phone and email
  4. Multiple industry-specific demo calendars enhance trust and usability
  5. Use of modern JavaScript libraries and tracking pixels for analytics and marketing
  6. No visible security vulnerabilities or exposed sensitive data
  7. Domain registration data consistent with business identity and location
Technical notes

Notes

The website uses a modern JavaScript stack including Swiper.js for UI components, Google Fonts for typography, and integrates multiple analytics and marketing pixels (Google Analytics, Facebook Pixel, TikTok Pixel) managed via Google Tag Manager. Hosting is on AWS infrastructure, inferred from DNS and S3 asset URLs, ensuring scalability and reliability. The site is well-optimized for mobile devices and performance is fast. No CMS is explicitly detected, suggesting a custom or static site architecture. SEO and accessibility features are well implemented, contributing to a professional user experience. Technical risks are minimal but could be further mitigated by adding security headers and DNSSEC.
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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