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Security report for hdk.cz

Hudební divadlo Karlín · Hospitality · Czech Republic

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

Security score

58/100

Risk levelMedium

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

Hudební divadlo Karlín is a musical theater company based in Prague, Czech Republic, offering a variety of theatrical performances and cultural events. The website serves as a platform for event information, ticket sales, and e-commerce related to the theater's offerings. It targets a general audience interested in musical theater and cultural activities. The business model revolves around ticket sales, merchandise, and educational programs. The site is well-branded and consistent, reflecting a medium-sized cultural institution with a solid local presence. Technically, the website employs modern web technologies including Bootstrap, jQuery, and various third-party libraries for UI components and tracking. It uses HTTPS and integrates multiple marketing and analytics tools such as Google Tag Manager, Facebook Pixel, and TikTok Pixel. The site is mobile-optimized and provides a good user experience with clear navigation and event listings. From a security perspective, the site uses HTTPS but lacks explicit security headers and a published security policy or incident response contacts. The absence of WHOIS data for the domain reduces trust and raises questions about domain registration legitimacy. Privacy compliance is basic, with a cookie consent mechanism present but no visible privacy policy or terms of service. Overall, the security posture is moderate but could be improved with better transparency and technical controls. The overall risk is moderate; the site appears legitimate and functional but would benefit from enhanced privacy disclosures, security headers, and verified domain registration information to increase trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, YouTube, Cloudflare, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

  2. 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.

  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

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

Keep watching hdk.cz

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.

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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
62
Security headers
80
Email security
65
DNS health
80
Network security
20
GDPR outside view
40
Average
58

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

Hudební divadlo Karlín operates as a cultural institution focused on musical theater in Prague. It holds a strong local market position as a recognized venue for theatrical performances. The business leverages ticket sales through a partner domain and offers additional services such as gift vouchers and educational programs. The company maintains active social media channels to engage its audience. Revenue streams primarily come from ticket sales and merchandise. The partnership with vstupenky.hdk.cz for ticketing indicates a strategic collaboration to streamline sales. Growth indicators include a robust event calendar and diversified offerings. The business model is traditional for cultural venues, focusing on audience engagement and event monetization.

Security posture

The website demonstrates a moderate security maturity level. HTTPS is enforced, which is mandatory for secure communications. However, the lack of visible security headers such as Content-Security-Policy and X-Frame-Options is a gap that could expose the site to certain attacks. No explicit security or incident response policies are published, limiting transparency and preparedness. The use of multiple third-party tracking scripts introduces potential privacy and security risks if not properly managed. No exposed sensitive data or obvious vulnerabilities were detected in the HTML content. Compliance with GDPR is partial, with cookie consent implemented but no privacy policy found. Incident response readiness appears low due to missing contact channels. Overall, the site should enhance its security controls and compliance documentation.

Recommendations

  1. Implement and publish a comprehensive privacy policy and terms of service to improve transparency and GDPR compliance.
  2. Add and verify security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen security posture.
  3. Obtain and verify domain WHOIS registration details to improve trustworthiness and legitimacy.
  4. Publish a security policy and incident response contact information to enhance preparedness and user trust.
  5. Regularly audit third-party scripts and tracking pixels to minimize privacy risks and ensure compliance.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Hudební divadlo Karlín
Description
Hudební divadlo Karlín is a musical theater based in Prague, Czech Republic, offering theatrical performances, ticket sales, and related cultural events.
Key services
Theatrical performances, Ticket sales, E-shop with gift vouchers and books, Educational and junior programs
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap, jQuery, Slick Carousel, FancyBox, Google Fonts, Typekit Fonts, daterangepicker, Bootstrap Select, CookieConsent, Google Tag Manager, Facebook Pixel, TikTok Pixel, Chatling AI chatbot
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced
  • Use of external trusted CDNs
  • No visible exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (implied by GTM), Facebook Analytics, TikTok Analytics, Adform
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Adform
Tracking pixels
Facebook Pixel, TikTok Pixel
Marketing tools
Facebook Pixel, TikTok Pixel
Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate

Key observations

  1. Website is a cultural institution site for Hudební divadlo Karlín in Prague.
  2. Content is rich with event listings and ticket purchase options.
  3. No explicit privacy policy or terms of service found on main site.
  4. Cookie consent mechanism is implemented.
  5. WHOIS data is missing or not publicly available, which is unusual and reduces trust.
  6. Multiple third-party tracking and marketing scripts are used.
  7. No direct contact emails or phone numbers found in the provided HTML snippet.
  8. Social media presence is strong with Facebook, Instagram, YouTube, TikTok links.
  9. Site uses HTTPS and modern frontend libraries.
  10. No signs of adult or unsafe content.
Technical notes

Notes

The website uses a modern technology stack with Bootstrap for responsive design, jQuery for DOM manipulation, and several UI libraries like Slick Carousel and FancyBox. Fonts are loaded from Google Fonts and Adobe Typekit. The site integrates multiple analytics and marketing tools including Google Tag Manager, Facebook Pixel, TikTok Pixel, and Adform. Cookie consent is managed via a third-party library. The CMS appears to be a custom or less common system named Tom Atom. Performance is moderate with external CDN usage for assets. Mobile optimization is good, but accessibility features are basic. SEO is supported by proper meta tags and structured data for events. Technical risks include reliance on multiple third-party scripts and lack of visible security headers. Hosting provider details are not available from the provided data.
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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