Skip to main content

Security report for tbz-flensburg.de

Technisches Betriebszentrum AöR · Government · Germany

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

55/100

Risk levelMedium

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

The Technisches Betriebszentrum Flensburg is a municipal service provider focused on environmental management, waste disposal, city maintenance, and infrastructure services for the city of Flensburg, Germany. The website presents a professional and comprehensive digital presence, offering detailed information about services, current news, and educational programs. The company maintains active communication channels including phone, email, and social media, enhancing accessibility for residents. Technically, the website is built on the gradwerk CMS 6 platform, utilizing modern web standards such as HTML5, CSS3, and JavaScript. It features responsive design and accessibility considerations, with a cookie consent mechanism compliant with GDPR. Performance is moderate with preloading of resources and optimized images. From a security perspective, the site enforces HTTPS and implements cookie consent management. However, it lacks explicit security policies, incident response contacts, and vulnerability disclosure mechanisms. No critical vulnerabilities or exposed sensitive data were detected. The WHOIS data aligns with the municipal identity, supporting legitimacy. Overall, the site is trustworthy, well-maintained, and suitable for its public service role. Strategic improvements in security transparency and incident response readiness would further enhance its posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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 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 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 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

  4. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

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

Keep watching tbz-flensburg.de

This scan found 25 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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
50
Email security
70
DNS health
60
Network security
20
GDPR outside view
68
Average
55

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention tbz-flensburg.de, from OffSeq Breach.

No leaked records found

Breach holds no records for tbz-flensburg.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Brand lookalikes

Add-on

Domains that imitate tbz-flensburg.de and could be used for phishing or spoofed email, tracked in OffSeq Breach.

Tracked
3
Registered
3
Resolving
3
High or critical
0

Last checked 2026-06-19

Masked preview

  • rb•••••••••••.deMediumreplacement
  • tb••••••.sburg.deLowsubdomain
  • tb••••••••.urg.deLowsubdomain

See the full lookalike list

A one-off add-on that lists up to 20 of the highest-risk lookalikes of tbz-flensburg.de with registration, mail-server, certificate and DNS signals.

Select it in the checkout above.

Lookalike data refreshes continuously. Monitoring on Breach alerts you when a variant is registered, gains a mail server or starts serving HTTPS.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The TBZ Flensburg operates as an essential municipal entity providing environmental and infrastructure services. Its market position is stable within the local government sector, serving residents and institutions of Flensburg. The business model is service-oriented, funded likely through municipal budgets and fees. Key services include waste management, street maintenance, green space care, and wastewater treatment. The company engages the community through educational programs and digital tools like the Mängelmelder app. Partnerships with the city government and related subsidiaries such as Das Campusbad and Flensburger Friedhöfe strengthen its ecosystem. The website content and social media presence indicate active community engagement and transparency.

Security posture

The website demonstrates a good baseline security posture with HTTPS enforced and cookie consent mechanisms in place. No security headers were explicitly detected in the HTML content, suggesting room for improvement. The absence of a published security policy or incident response contact reduces transparency. No vulnerability disclosure or security.txt file was found, which is a common best practice. The site does not expose sensitive information or use outdated libraries visibly. Overall, the security maturity is moderate, suitable for a municipal informational site but could benefit from enhanced security documentation and headers.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and user data handling.
  2. Provide clear incident response contact information, such as a security@ or abuse@ email address.
  3. Implement and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Add security HTTP headers like Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  5. Regularly review and update third-party scripts and libraries to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
Technisches Betriebszentrum AöR
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Technisches Betriebszentrum AöR
Description
Kommunales Unternehmen in Flensburg, Deutschland, das Dienstleistungen in den Bereichen Abfallwirtschaft & Entsorgung, Stadtbildpflege & Reinigung, Grünflächen & Wälder, Straßen & Verkehr, Klärwerk & Entwässerung sowie Winterdienst & Räumungspflicht anbietet.
Key services
Abfallwirtschaft & Entsorgung, Stadtbildpflege & Gebäudereinigung, Grünflächen & Wälder, Straßen & Verkehr, Klärwerk & Entwässerung, Winterdienst & Räumungspflicht, Umweltbildung und Führungen
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, SVG
Frameworks
gradwerk CMS 6
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent management implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Vimeo, YouTube
Marketing tools
Cookie consent management
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible and not blocked by WAF or security mechanisms.
  2. Content is in German and targeted at Flensburg residents and institutions.
  3. Comprehensive cookie consent and privacy management implemented.
  4. No terms of service page found.
  5. Multiple contact methods including email, phone, physical addresses, and contact form available.
  6. Social media presence on Facebook and Instagram.
  7. No explicit security policy or incident response contact found.
  8. No vulnerability disclosure or security.txt file found.
  9. Website uses a proprietary CMS (gradwerk CMS 6).
  10. No suspicious or malicious content detected.
Technical notes

Notes

The website uses a proprietary CMS (gradwerk CMS 6) with modern front-end technologies including HTML5, CSS3, JavaScript, and SVG graphics. It preloads critical CSS and JS resources to optimize loading times. The site is mobile responsive and includes accessibility features such as skip links and ARIA roles. SEO is supported by meta tags, Open Graph tags, and canonical URLs. External integrations include social media and video platforms (YouTube, Vimeo). Performance is moderate, with potential for further optimization. No hosting provider details were found in the content. Overall, the technical infrastructure is solid for a municipal website but could benefit from enhanced security headers and performance tuning.
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

Reviews of this site

Share your experience with tbz-flensburg.de. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review tbz-flensburg.de.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.