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Security report for kultursommer-eroeffnung.de

Landeshauptstadt Mainz · Government · Germany

Medium risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

73/100

Risk levelMedium

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

Landeshauptstadt Mainz operates an official municipal website providing comprehensive information about cultural events such as the Kultursommer Eröffnungsfest 2025. The site targets residents and visitors interested in cultural and community activities, offering detailed event programs, partner information, and accessibility features. The website is well-branded, consistent, and professionally maintained, reflecting the city's commitment to public service and cultural promotion. Technically, the site uses a custom CMS (Sitepark Information Enterprise Server) with modern JavaScript libraries like jQuery and Modernizr, and integrates Matomo analytics for privacy-conscious user tracking. The site is mobile-optimized and accessible, with clear navigation and multilingual support. Security posture is strong with HTTPS enforced and cookie consent mechanisms in place, though HTTP security headers could be improved. WHOIS data confirms the domain's legitimacy as an official city domain. Overall, the site is trustworthy, compliant with GDPR, and provides a positive user experience.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

2 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

  2. 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 kultursommer-eroeffnung.de

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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  • 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
60
Email security
70
DNS health
60
Network security
100
GDPR outside view
83
Average
73

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 website represents the city government of Mainz, Germany, focusing on cultural event promotion and public information dissemination. Its market position is that of an authoritative municipal entity, providing services to local residents and tourists. The business model is public service with no commercial intent, supported by partnerships with local sponsors and cultural institutions. The site demonstrates strong growth in digital maturity with integrated analytics and accessibility features. Partnerships with regional banks, cultural foundations, and event sponsors indicate a robust ecosystem supporting cultural initiatives. The site’s content and structure suggest a strategic focus on community engagement and cultural heritage promotion.

Security posture

The website exhibits a mature security posture with HTTPS enabled and a cookie consent banner supporting GDPR compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. Email addresses are obfuscated to prevent scraping. However, the absence of explicit HTTP security headers such as Content Security Policy (CSP), HSTS, or X-Frame-Options suggests room for improvement. There is no visible security policy or incident response contact information, which could enhance transparency and readiness. Overall, the site is secure for its purpose but could benefit from adopting additional security best practices and publishing a security.txt file.

Recommendations

  1. Implement HTTP security headers including CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  2. Publish a dedicated security policy page and provide clear incident response contact channels to improve transparency and trust.
  3. Add a security.txt file at the root domain to facilitate responsible vulnerability disclosure.
  4. Regularly update JavaScript libraries to the latest secure versions to mitigate potential vulnerabilities.
  5. Continue enhancing accessibility and mobile optimization to maintain excellent user experience across devices.

Contact details published on the site

Addresses
Legal name
Landeshauptstadt Mainz
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Landeshauptstadt Mainz
Description
Official city website providing information about the Kultursommer Eröffnungsfest 2025, a cultural summer opening festival in Mainz with music, theater, and family activities.
Key services
Event information and promotion, Public service information, Cultural program details
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 1.11.2, Modernizr, Sitepark Information Enterprise Server, Matomo Analytics
Frameworks
SP.Website (Sitepark custom framework)
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner implemented
  • No exposed sensitive data in HTML
  • Use of encrypted email obfuscation

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Marketing tools
Matomo Analytics
Transparency
basic

Site quality

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

Key observations

  1. Official municipal website for the city of Mainz, Germany.
  2. Provides detailed event information for Kultursommer Eröffnungsfest 2025.
  3. Strong focus on accessibility and multilingual support.
  4. Includes comprehensive privacy and cookie policies with consent mechanism.
  5. Uses Matomo for analytics, respecting privacy compliance.
  6. No signs of security incidents or vulnerabilities in the content.
  7. No advertising networks detected beyond analytics.
  8. Clear and consistent branding with official logos and partner acknowledgments.
Technical notes

Notes

The website is built on the Sitepark Information Enterprise Server CMS, utilizing jQuery 1.11.2 and Modernizr for feature detection and compatibility. It employs custom Sitepark JavaScript libraries for navigation, toggles, accordions, and image viewing. Matomo analytics is integrated asynchronously for privacy-respecting user tracking. The site uses responsive CSS stylesheets and includes accessibility features such as skip links and ARIA attributes. Performance is moderate, with room for optimization in script loading and image sizes. The site is mobile-optimized with breakpoints and off-canvas navigation. No major technical debt or deprecated technologies were detected, but updating jQuery to a more recent version could improve security and performance.
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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