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Security report for meinduisburg.app

Stadt Duisburg · Government · Germany

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

70/100

Risk levelMedium

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

The website meinduisburg.app serves as the official municipal app portal for the city of Duisburg, Germany. It provides residents with comprehensive information about local services such as waste collection schedules, event calendars, children's city maps, and climate-related initiatives. The site targets private customers (citizens) and offers direct download links to the MEIN DUISBURG app on Apple and Android platforms. The business model is focused on delivering public services digitally to enhance citizen engagement and convenience. Technically, the website is built on TYPO3 CMS with Bootstrap 5 for responsive design. It integrates Matomo for analytics and Usercentrics for GDPR-compliant cookie consent management. The site demonstrates good mobile optimization, accessibility, and SEO practices, reflecting a mature digital infrastructure suitable for a government entity. From a security perspective, the site enforces HTTPS with strong SSL configuration and includes standard security headers. No critical vulnerabilities or exposed sensitive data were detected. However, explicit security policies and incident response contacts are not published, representing an area for improvement. Overall, the website is trustworthy, professionally maintained, and compliant with privacy regulations. It effectively serves its purpose as a municipal information hub, with recommendations to enhance transparency around security and incident handling to further strengthen user trust.

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. 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

    • 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 meinduisburg.app

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

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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
77
Security headers
30
Email security
85
DNS health
75
Network security
100
GDPR outside view
53
Average
70

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 MEIN DUISBURG app and website position themselves as a key digital touchpoint for Duisburg's citizens, offering a centralized platform for municipal information and services. The app's features such as the waste calendar, children's city map, and climate rewards program (KlimaGold) indicate a focus on community engagement and sustainability. The business model is service-oriented, funded and operated by the city government, targeting local residents primarily. The presence of partner domains suggests collaboration with local service providers. The website's content and testimonials highlight user satisfaction and practical utility, supporting a strong local market presence.

Security posture

The website exhibits a solid security posture with enforced HTTPS, comprehensive security headers, and GDPR-compliant cookie consent mechanisms. The use of Matomo analytics respects privacy better than many third-party trackers. No signs of malware, phishing, or exposed credentials were found. However, the absence of a published security policy, vulnerability disclosure program, or incident response contact limits transparency and preparedness perception. The site benefits from TYPO3's secure CMS framework and standard security practices but could improve by publishing explicit security governance documentation.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and user guidance.
  2. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  4. Regularly review and update third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Enhance transparency by including data retention policies and detailed privacy notices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Stadt Duisburg
Description
Die MEIN DUISBURG-App informiert Bürger über städtische Services, Veranstaltungen, Abfallkalender, Kinderstadtplan, Klimadaten und weitere lokale Informationen.
Key services
Abfallkalender, Kinderstadtplan, Klimadaten (KlimaGold), Veranstaltungskalender, Stadtkarte, ÖPNV-Informationen
Content quality
good
Branding
consistent

Technology

Stack
TYPO3 CMS, Bootstrap 5, Matomo Analytics, Usercentrics Consent Management, Photoswipe, Popper.js
Frameworks
Bootstrap, TYPO3 CMS
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Consent management implemented
  • No exposed sensitive data in HTML
  • Secure forms with CSRF protection (implied by TYPO3 and Powermail)

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Marketing tools
Usercentrics Consent Management
Transparency
good

Site quality

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

Key observations

  1. Website is a municipal service app portal for Duisburg residents.
  2. Content is well structured and professionally presented.
  3. Strong focus on local services and community engagement.
  4. Good implementation of privacy and cookie consent mechanisms.
  5. No signs of malicious or suspicious activity.
  6. Use of modern web technologies and analytics tools.
  7. No direct contact emails or phone numbers found on this page; contact via dedicated contact page.
  8. No explicit security or incident response policies published.
Technical notes

Notes

The website is built on a modern and robust technical stack featuring TYPO3 CMS and Bootstrap 5, ensuring responsive and accessible design. Integration of Matomo analytics and Usercentrics consent management reflects a mature approach to privacy and data governance. Performance is moderate, with asynchronous loading of scripts and optimized images. The site uses standard security headers and enforces HTTPS, contributing to a secure user experience. Opportunities exist to improve hosting transparency and implement advanced performance optimizations. Overall, the technical infrastructure supports the business goals effectively with room for incremental enhancements.
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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