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Security report for aareon.de

Aareon Deutschland GmbH · Real Estate · Germany

Medium risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

73/100

Risk levelMedium

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

Aareon Deutschland GmbH operates a professional and comprehensive website focused on providing SaaS property management solutions tailored for the European real estate sector. The company positions itself as a market leader offering integrated ERP systems, digital customer portals, and sustainability planning tools for residential and commercial real estate management. The website content is well-structured, professionally designed, and targets real estate companies, property managers, and investors. The digital infrastructure includes modern web technologies such as jQuery and Swiper.js, with a CMS likely based on SixCMS. The site is mobile-optimized and SEO-friendly, providing a positive user experience. Security posture is good with HTTPS enforced and cookie consent mechanisms in place, though explicit security policies and incident response contacts are not published. The domain WHOIS data aligns with the company’s branding and infrastructure, supporting legitimacy. Overall, the website reflects a mature enterprise with strong business credibility and compliance with GDPR.

Scanned

NIS2 and GDPR posture

GDPR outside view
43/ 100 · High
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

3 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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

  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

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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
77
Security headers
85
Email security
70
DNS health
60
Network security
100
GDPR outside view
43
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

Breach exposure

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

Brand lookalikes

Add-on

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

Tracked
25
Registered
25
Resolving
25
High or critical
0

Last checked 2026-06-20

Masked preview

  • aa••••.deMediumbitsquatting
  • ac••••.deMediumbitsquatting
  • ea••••.deMediumbitsquatting

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Technical appendix

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

Business context

Business profile

Aareon is a key player in the European real estate software market, offering a SaaS business model focused on property management systems and digital transformation solutions. Their customer base includes housing cooperatives, property owners, and commercial real estate investors. The company leverages a partner ecosystem to enhance its offerings and integrates payment and sustainability solutions. The website highlights customer testimonials and partner logos, reinforcing trust and market presence. The absence of direct contact emails or phone numbers on the homepage suggests a controlled communication channel via contact forms and dedicated portals. The company’s strategic focus on innovation, sustainability, and customer experience positions it well for continued growth in the real estate technology sector.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and a cookie consent banner compliant with GDPR. Use of HubSpot for analytics and marketing is transparent with user consent options. However, the absence of published security policies, incident response contacts, or vulnerability disclosure mechanisms indicates room for improvement in security transparency and readiness. No security headers were detected in the HTML content, which could be enhanced to protect against common web vulnerabilities. No exposed sensitive data or vulnerable libraries were found. Overall, the security posture is good but could benefit from formalized policies and improved header configurations.

Recommendations

  1. Publish a dedicated security policy page outlining security frameworks and practices.
  2. Add incident response contact information such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file.
  4. Enhance HTTP security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  5. Improve accessibility features to meet higher standards and broaden user inclusivity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Aareon Deutschland GmbH
Description
Aareon ist Europas etablierter Anbieter von SaaS-Lösungen für die Immobilienwirtschaft und Wegbereiter für die digitale Zukunft der Branche.
Key services
Property Management System, ERP-Lösungen für Wohn- und Gewerbeimmobilien, Digitale Kundenportale und Apps, Zahlungslösungen, Nachhaltigkeits- und Instandhaltungsplanung, Partner-Ökosystem Integration
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery, Swiper.js, HTML5, CSS3
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

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

Analytics and tracking

Services
HubSpot
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
HubSpot
Marketing tools
HubSpot
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 with no blocking or WAF challenges.
  2. Content is professional, well-structured, and targeted at real estate industry professionals.
  3. Strong emphasis on SaaS property management solutions and digital transformation.
  4. Cookie consent and privacy policies are implemented and GDPR compliant.
  5. No direct contact emails or phone numbers found on homepage; contact via form/link only.
  6. No explicit security policy or incident response information published.
  7. Use of HubSpot for marketing and analytics with user consent.
  8. No suspicious or malicious content detected.
  9. Good mobile optimization and modern UI components.
Technical notes

Notes

The website uses a modern but straightforward technology stack including jQuery and Swiper.js for UI interactions. The CMS appears to be SixCMS, inferred from media URLs. The site is mobile responsive and optimized for SEO with proper meta tags and Open Graph data. Performance is moderate, with no explicit hosting provider identified. The site uses HTTPS exclusively, ensuring encrypted communications. The cookie consent mechanism is well implemented, leveraging HubSpot for marketing and analytics with user opt-in. There is no evidence of technical debt or outdated libraries, but security headers could be improved. Overall, the technical infrastructure supports a professional and scalable web 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

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