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Security report for zwischengas.com

Zwischengas AG · Media · Switzerland

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

69/100

Risk levelMedium

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

Zwischengas AG operates zwischengas.com, the largest German-language online platform dedicated to classic automobiles, including oldtimers, youngtimers, and historic motorsport. The website offers detailed reports, news, event coverage, a marketplace for buying and selling vehicles and parts, and premium subscription services for an ad-free experience. The company targets classic car enthusiasts and collectors primarily in the German-speaking region, with a strong presence in Switzerland. The business model combines advertising, premium subscriptions, and marketplace services, positioning Zwischengas as a leading media and community platform in its niche. Technically, the website employs a mature technology stack including jQuery, Bootstrap, Google Tag Manager, and various consent management tools to ensure GDPR compliance. The site is mobile-optimized with good SEO and accessibility features, though some improvements could be made in accessibility and security headers. The integration of social login options via Google and Facebook enhances user experience and security. From a security perspective, the site enforces HTTPS and uses consent management for cookies and tracking. While no critical vulnerabilities were detected in the provided content, the absence of some security headers and the lack of visible incident response or security policy pages suggest areas for improvement. The WHOIS data is missing or unavailable, which is unusual but does not detract significantly from the site's legitimacy given the professional presentation and business information. Overall, Zwischengas.com is a professional, content-rich platform with strong privacy compliance and a solid security posture. Strategic recommendations include enhancing security headers, conducting regular security audits, and improving accessibility to further strengthen trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
70/ 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

5 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 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

    • 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

  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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching zwischengas.com

This scan found 21 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

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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
65
DNS health
85
Network security
100
GDPR outside view
70
Average
69

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

Zwischengas AG holds a strong market position as the leading German-language online media platform for classic automobiles. Its competitive advantage lies in comprehensive content offerings, including exclusive articles, a large digital archive, and a marketplace. The business model leverages multiple revenue streams: advertising, premium subscriptions, and marketplace fees. The target customers are classic car enthusiasts, collectors, and industry professionals in the DACH region. Growth indicators include active event coverage, partnerships with auction houses like RM Sotheby's, and a robust social media presence. The company maintains strategic partnerships with related media and auction platforms, enhancing its ecosystem and market reach.

Security posture

The website demonstrates a good security maturity level with enforced HTTPS, GDPR-compliant cookie consent, and secure social login integrations. No exposed sensitive data or obvious vulnerabilities were found in the HTML content. However, the absence of explicit security policies, incident response contacts, and some recommended security headers (CSP, X-Frame-Options) indicates room for improvement. Compliance with GDPR is evident, but no specific NIS2 or ISO 27001 frameworks are referenced. The site would benefit from formalizing incident response procedures and publishing security policies to enhance transparency and readiness.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a dedicated security policy and incident response contact information on the website.
  3. Conduct regular security audits and penetration testing to identify and remediate vulnerabilities.
  4. Enhance accessibility features to meet WCAG standards and improve user inclusivity.
  5. Maintain up-to-date third-party libraries and monitor for security patches.

Contact details published on the site

Addresses
Legal name
Zwischengas AG
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Zwischengas AG
Description
zwischengas.com ist die grösste Online-Plattform rund um klassische Automobile im deutschsprachigen Raum.
Key services
News and reports on classic cars, Event and auction coverage, Marketplace for buying and selling classic vehicles and parts, Premium subscription for ad-free experience, Newsletter and magazine publishing
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.5.1, jQuery UI 1.12.1, Bootstrap 4.5.2, Google Tag Manager, Google Analytics, Facebook SDK, Consent Manager (consentmanager.net), Postscribe, SWFObject, TableSorter
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Consent management for cookies
  • No exposed sensitive data in HTML
  • Use of secure login mechanisms (OAuth via Google and Facebook)

Analytics and tracking

Services
Google Analytics, Microsoft Clarity
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google AdSense
Tracking pixels
Facebook Pixel, Microsoft Clarity
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. Strong GDPR and cookie consent implementation.
  3. Multiple social login options (Google, Facebook) integrated securely.
  4. Comprehensive navigation and content structure for classic automobile enthusiasts.
  5. No security or privacy policy pages explicitly labeled as such beyond GDPR and cookie consent.
  6. WHOIS data missing, which reduces trust but website professionalism compensates.
  7. Use of multiple third-party analytics and advertising services.
  8. No signs of malware, phishing, or suspicious content.
  9. Content is safe for general audiences.
Technical notes

Notes

The website uses a mature and stable technology stack centered on jQuery, Bootstrap, and various Google services for analytics and tag management. Consent management is robust, ensuring GDPR compliance. Performance is moderate with some asynchronous loading of scripts and ads. Mobile optimization is good, with responsive design and language localization. The site does not appear to use a common CMS, suggesting a custom or proprietary platform. Technical risks include potential outdated libraries and missing security headers. Opportunities exist to modernize JavaScript frameworks and improve accessibility and security configurations to reduce technical debt and enhance resilience.
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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