Skip to main content

Security report for immoblueplus.de

Aareon · Real Estate · N/a

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

71/100

Risk levelMedium

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

Aareon is a leading European SaaS provider specializing in property management systems designed to streamline operations for property owners and managers. The company offers a comprehensive suite of solutions including management, payments, sustainability planning, and customer engagement portals. Their market position is strong within the real estate sector, supported by a large ecosystem of partners and localized country sites. Technically, the website is built on HubSpot CMS with modern JavaScript libraries and is optimized for mobile and accessibility. Security posture is good with HTTPS and security headers in place, though explicit security policies and incident response information are not publicly available. Privacy compliance is robust with clear cookie consent mechanisms and a comprehensive privacy policy. The domain WHOIS data is unavailable, which reduces transparency and trustworthiness, but the professional website content and branding mitigate some concerns. Overall, the site scores well on content quality, technical implementation, and security, but could improve business credibility by providing more direct contact information and security disclosures.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

3 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"

  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
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching immoblueplus.de

This scan found 23 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. See sample alerts.

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
57
Security headers
45
Email security
75
DNS health
65
Network security
100
GDPR outside view
83
Average
71

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

Aareon operates in the real estate SaaS market, targeting property owners, managers, and related stakeholders across Europe. Their business model focuses on delivering integrated property management solutions via a SaaS platform, supported by a partner ecosystem and localized country websites. The company leverages its 67 years of experience to digitize property management processes, emphasizing sustainability and customer engagement. Their revenue streams likely include software subscriptions, service integrations, and partner collaborations. The presence of multiple country-specific domains indicates a broad geographic reach and localized market approach. The company maintains a professional online presence with strong branding and customer testimonials, positioning itself as a trusted partner in the property management industry.

Security posture

The website enforces HTTPS with strong SSL configuration and includes key security headers such as Content-Security-Policy and Strict-Transport-Security. No exposed sensitive data or vulnerable libraries were detected in the HTML content. Forms appear secure with no visible injection or data leakage issues. However, the absence of a published security policy, incident response plan, or vulnerability disclosure program limits transparency and preparedness perception. No direct security contact emails were found, which could hinder incident reporting. Overall, the security posture is solid but could be enhanced by publishing formal security documentation and providing clear incident response contacts.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency and trust.
  2. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  3. Provide direct company contact emails and phone numbers for sales, support, and security inquiries.
  4. Regularly audit and update third-party integrations to ensure ongoing security compliance.
  5. Enhance business credibility by including company registration details and certifications on the website.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Aareon
Description
Aareon provides a trusted SaaS property management system designed to streamline management and improve service delivery for property owners and managers across Europe.
Key services
Property Management System, Manage (system of record), Payments solutions, Sustainability planning, Customer engagement portals and apps, Partner ecosystem integrations
Content quality
excellent
Branding
consistent

Technology

Stack
HubSpot CMS, Splide.js carousel, htmx, HTML5 video, CSS3, JavaScript
Frameworks
HubSpot CMS
Platforms
HubSpot
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • No exposed sensitive data in HTML
  • Secure forms with no visible vulnerabilities

Analytics and tracking

Services
HubSpot analytics
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
HubSpot marketing tools
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 rich content and multimedia
  2. Strong focus on SaaS property management solutions for European market
  3. Good privacy and cookie compliance with explicit consent mechanisms
  4. No visible security or privacy policy pages beyond privacy and cookie policies
  5. No direct contact emails or phone numbers found on homepage; contact via form
  6. WHOIS data unavailable, reducing domain transparency
  7. No signs of malware, phishing, or suspicious content
  8. Professional branding and consistent design
  9. Multiple partner country sites linked
Technical notes

Notes

The website is built on the HubSpot CMS platform, utilizing modern front-end technologies including Splide.js for carousels and htmx for dynamic content loading. It features responsive design optimized for mobile devices and includes accessibility considerations. Performance is moderate, with multimedia content such as videos and high-resolution images. SEO is supported by proper meta tags and Open Graph data. Hosting is managed by HubSpot, providing reliable infrastructure. There is no evidence of technical debt or deprecated technologies. Opportunities exist to improve performance by optimizing media assets and implementing advanced caching strategies.
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 immoblueplus.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 immoblueplus.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.