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Security report for vonovia.de

Vonovia SE · Real Estate · Germany

Low risk. 1 critical or high finding in SSL/TLS.

Security score

81/100

Risk levelLow

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

Vonovia SE is a leading real estate company in Germany, providing housing solutions nationwide with a focus on fair pricing. The website reflects a professional enterprise-grade digital presence with consistent branding and a clear business model centered on property rental and management. The technical infrastructure leverages Microsoft Azure DNS and hosting, with modern web technologies and a GDPR-compliant cookie consent mechanism via Cookiebot. Security posture is solid with HTTPS and no visible vulnerabilities, though there is room for improvement in publishing explicit security policies and incident response information. Overall, the site is trustworthy, well-structured, and targets German-speaking audiences effectively.

Scanned

This is an earlier scan of vonovia.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
88/ 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

1 finding rated critical or high. Fix these first.

  1. 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 vonovia.de

This scan found 16 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
72
Security headers
85
Email security
73
DNS health
70
Network security
100
GDPR outside view
88
Average
81

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

Vonovia holds a strong market position as a major real estate provider in Germany, operating multiple subsidiary domains and related sites for various business functions including careers, reporting, and customer service. The business model focuses on residential property management and rental services. The company benefits from a broad partnership ecosystem and maintains consistent branding across its digital assets. Growth indicators include extensive domain portfolio and integration of modern consent management tools. The website content is professional and relevant to its target audience of tenants and property seekers.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, use of reputable hosting (Azure), and implementation of a comprehensive cookie consent mechanism. However, it lacks publicly available security policies, incident response contacts, and vulnerability disclosure information, which are important for transparency and trust. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. Security headers are not explicitly visible in the provided data, suggesting an area for enhancement. Overall, the security maturity is good but could be improved with more explicit documentation and contact channels.

Recommendations

  1. Publish a dedicated security policy page outlining security frameworks and practices.
  2. Provide clear incident response and vulnerability disclosure contacts, including security@ or abuse@ email addresses.
  3. Implement and verify security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Maintain and update privacy and cookie policies regularly with clear links accessible from the homepage.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Vonovia SE
Description
Als eines der führenden Immobilienunternehmen in Deutschland geben wir Menschen ein Zuhause. Dabei bieten wir bundesweit Wohnungen zu fairen Preisen.
Key services
Wohnungsvermietung, Immobilienverwaltung
Content quality
good
Branding
consistent

Technology

Stack
Azure DNS, Cookiebot, econda analytics, JavaScript, HTML5, CSS3
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
econda
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google
Tracking pixels
Cookiebot, Google
Marketing tools
Cookiebot
Transparency
good

Site quality

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

Key observations

  1. Website uses Cookiebot for GDPR-compliant cookie consent.
  2. No explicit privacy policy or terms of service pages detected in the provided content.
  3. No direct contact emails or phone numbers found in the HTML snippet.
  4. Multiple related and subsidiary domains are linked and consented under the cookie mechanism.
  5. Website is in German language targeting German market.
  6. No security.txt or vulnerability disclosure information found.
  7. No explicit security policy or incident response information found.
  8. Website uses HTTPS and modern DNS hosting on Azure.
  9. No signs of adult or questionable content.
  10. Good use of meta tags and Open Graph for SEO and social sharing.
Technical notes

Notes

The website uses a modern technology stack including Azure DNS and hosting, JavaScript, and Cookiebot for consent management. Performance is moderate with good mobile optimization and SEO practices evident from meta tags and Open Graph data. The site lacks explicit CMS identification but appears professionally developed with structured HTML and CSS. There is potential to improve technical documentation and accessibility compliance. No deprecated or vulnerable libraries were detected in the provided scripts. Overall, the technical infrastructure supports a reliable and scalable online presence.
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

Earlier scans of this domain

  1. 81/100Low25 findingsView report
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