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Security report for karldergrosse.ch

Karl der Grosse · Hospitality · Switzerland

Medium risk. 6 critical or high findings in Email security, Security headers and 2 other checks.

Security score

64/100

Risk levelMedium

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

Karl der Grosse is a well-established cultural and hospitality venue located in Zurich, Switzerland, offering a diverse range of services including a bistro, event space rentals, and a rich program of cultural events. The venue is municipally affiliated, enhancing its credibility and market position as a key cultural hub. The website reflects a professional and consistent brand image targeting a general audience interested in culture, dining, and event participation. Technically, the site is built on modern frameworks such as Nuxt.js and Vue.js, ensuring good performance and mobile optimization. Security posture is strong with HTTPS and security headers implemented, though some compliance aspects like cookie consent and security policies could be improved. Overall, the site is trustworthy and professionally maintained, with moderate tracking and marketing tools in use.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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. 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.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. 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 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';…

  3. 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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching karldergrosse.ch

This scan found 24 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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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
65
Security headers
30
Email security
60
DNS health
75
Network security
100
GDPR outside view
53
Average
64

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 business operates primarily in the hospitality and cultural sectors, supported by the City of Zurich. Its business model revolves around venue operation, hospitality services, and cultural programming, targeting local residents and visitors interested in cultural events and dining experiences. The presence of online reservation options and group booking links indicates a customer-centric approach. The partnership with municipal entities and presence on major social media platforms strengthen its market presence. The website content and structure support clear communication of services and events, facilitating user engagement and bookings.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and no visible exposure of sensitive data. However, the absence of a cookie consent mechanism and lack of published security or incident response policies represent compliance gaps, especially under GDPR and related regulations. No vulnerabilities or outdated libraries were detected in the provided content. The site would benefit from formalizing its security policies and providing clear incident response contacts to enhance trust and compliance.

Recommendations

  1. Implement a GDPR-compliant cookie consent banner to inform users and obtain consent for tracking.
  2. Publish clear terms of service and security policy pages to improve legal transparency.
  3. Add a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  4. Enhance the privacy policy with detailed GDPR compliance information and data retention policies.
  5. Regularly review and update security headers and monitor for any emerging vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Karl der Grosse
Description
Karl der Grosse is a cultural and hospitality venue in Zurich offering a bistro, event spaces for rent, and a program of cultural events including festivals, exhibitions, and participatory formats.
Key services
Bistro dining, Room rental for events and workshops, Cultural event programming, Live streaming and replay services
Content quality
good
Branding
consistent

Technology

Stack
Vue.js, Nuxt.js, Swiper.js
Frameworks
Nuxt.js
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

Marketing tools
Mailchimp (newsletter)
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Content is primarily in German (Swiss variant).
  3. Clear navigation with multiple service offerings.
  4. No signs of phishing, malware, or suspicious activity.
  5. Social media presence on major platforms.
  6. No visible cookie consent banner despite tracking usage.
  7. No explicit security or incident response policies published.
Technical notes

Notes

The website uses a modern JavaScript framework (Nuxt.js with Vue.js) and integrates Swiper.js for interactive elements. The site is mobile-optimized and accessible, with good SEO practices evident in meta tags and structured navigation. Performance is moderate, likely due to rich media content such as images and event listings. Hosting details are not explicit but the site uses HTTPS with strong SSL configuration. The technical stack is current and well-maintained, though opportunities exist to improve compliance-related technical implementations such as cookie management.
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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