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Security report for abwasser-rendsburg.de

Abwasserbeseitigung Rendsburg · Energy · Germany

Partial score · DNS & email only

48/100

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

Abwasserbeseitigung Rendsburg is a municipal utility service responsible for wastewater disposal and treatment in the city of Rendsburg and surrounding areas including Büdelsdorf. The organization operates a dedicated sewage treatment plant and provides related services such as property drainage management. The website serves as an informational portal for residents and businesses, offering updates, contact information, and access to service-related forms. The market position is that of a local government service provider with a clear focus on environmental and public utility functions. Technically, the website is built on the Contao Open Source CMS platform, utilizing standard web technologies including HTML5, CSS, JavaScript, and jQuery. The site is hosted on infrastructure associated with Schleupen, a known service provider. While the site is functional and moderately optimized for mobile devices, it lacks advanced SEO and accessibility features. The absence of modern security headers and cookie consent mechanisms indicates room for improvement in technical security and privacy compliance. From a security perspective, the site uses HTTPS and includes CSRF tokens in forms, which are positive indicators. However, no explicit security policies, incident response contacts, or vulnerability disclosure mechanisms are present. The WHOIS data aligns well with the website's municipal nature, showing consistent domain registration and no privacy protection, supporting legitimacy. Overall, the security posture is moderate but could benefit from enhanced headers, policies, and transparency. The overall risk assessment is low given the nature of the business and the absence of sensitive data exposure or suspicious activity. Strategic recommendations include implementing security headers, adding cookie consent and privacy enhancements, publishing security and incident response policies, and updating technical components to modern standards to improve trust and compliance.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

4 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

    • High

      No SPF record found

      SPF helps prevent email spoofing

      What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"

  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
  3. 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

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Keep watching abwasser-rendsburg.de

This scan found 18 issues across 4 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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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
72
Email security
40
DNS health
60
Network security
20
Average
48

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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

Abwasserbeseitigung Rendsburg operates as a municipal utility focused on wastewater management within the city of Rendsburg and nearby Büdelsdorf. Its competitive advantage lies in its official status as a city-operated service, ensuring regulatory compliance and local trust. The business model is service-oriented, funded likely through municipal budgets and user fees. Revenue streams are primarily from service charges for wastewater disposal and treatment. The target customer segments include residential, commercial, and municipal clients within the service area. Growth indicators are not explicit but the presence of federal funding programs suggests ongoing infrastructure investments. The partnership ecosystem includes hosting and technical service providers such as Schleupen. Strategic observations highlight a stable, essential public service with limited commercial competition but opportunities for digital modernization and enhanced customer engagement.

Security posture

The current security maturity level is moderate. The website employs HTTPS and includes CSRF tokens in forms, which are good practices. However, the lack of security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces defense-in-depth. No incident response or security policy information is published, limiting transparency and preparedness. There are no visible vulnerabilities or exposed sensitive data, but the use of older JavaScript libraries like jQuery 1.11.4 may pose risks if not regularly updated. Compliance with GDPR is partially indicated by the presence of a privacy policy, but cookie consent mechanisms are missing. Overall, the security culture appears basic with room for improvement in policy publication, technical controls, and user privacy protections.

Recommendations

  1. Implement HTTP security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Add a cookie consent banner and clearly document cookie usage to improve GDPR compliance and user privacy transparency.
  3. Publish a formal security policy and incident response plan on the website to increase trust and preparedness.
  4. Regularly update all JavaScript libraries and CMS components to mitigate vulnerabilities from outdated software.
  5. Enhance accessibility and mobile optimization to improve user experience and broaden audience reach.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Abwasserbeseitigung Rendsburg
Description
Der Abwasserbetrieb der Stadt Rendsburg entsorgt alle Abwässer in der Stadt Rendsburg und dem Umlad und bereitet sie im betriebseigenen Klärwerk auf.
Key services
Wastewater disposal, Wastewater treatment, Grundstücksentwässerung (property drainage), Klärwerk operation (sewage treatment plant)
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS, JavaScript, jQuery 1.11.4, Colorbox 1.6.1
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • Use of HTTPS (implied by base href https://abwasser-rendsburg.de/)
  • Use of CSRF token in form (REQUEST_TOKEN field)

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Transparency
poor

Site quality

Design
basic
User experience
basic
Content relevance
good
Navigation
good
Professionalism
basic
Trustworthiness
moderate

Key observations

  1. Website is a municipal utility site for wastewater management in Rendsburg, Germany.
  2. Content is in German and targeted at local residents and businesses.
  3. No privacy or cookie banners detected, but privacy policy page exists.
  4. No visible security policy or incident response information.
  5. Uses Contao CMS and jQuery with some UI plugins.
  6. No advertising or tracking services detected.
  7. Contact information is clearly provided including email, phone, and physical address.
  8. No social media links found.
  9. No structured data (JSON-LD or Open Graph) detected in HTML head.
  10. No terms of service or vulnerability disclosure pages found.
Technical notes

Notes

The website is built on the Contao CMS platform with a technology stack including HTML5, CSS, JavaScript, and jQuery 1.11.4. It uses external resources such as Google Fonts and Colorbox for UI enhancements. Hosting is likely provided by Schleupen, as indicated by the nameservers. Performance is moderate with basic mobile responsiveness and accessibility features. SEO optimization is basic with meta description tags but no Open Graph or structured data markup. The site uses HTTPS as indicated by the base href but no explicit security headers are detected. Forms include CSRF tokens, indicating some security awareness. Overall, the technical infrastructure is functional but could benefit from modernization, improved security configurations, and enhanced SEO and accessibility practices.
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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