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Security report for hc24.de

HC24 GmbH & Co. KG · Real Estate · Germany

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

58/100

Risk levelMedium

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

HC24 GmbH & Co. KG operates an online platform specializing in furnished temporary housing rentals across Germany. The website offers a user-friendly search and booking experience for furnished apartments, rooms, and houses, targeting individuals seeking flexible living arrangements. The company positions itself as a trusted intermediary with verified listings and customer support. Technically, the website is built on modern frameworks such as Next.js and React, with media assets hosted on Amazon S3, ensuring a moderate to good performance and mobile optimization. Security-wise, the site enforces HTTPS and implements a comprehensive cookie consent mechanism, though lacks visible security headers and explicit security or privacy policy pages. Overall, the site is professional, trustworthy, and compliant with basic privacy regulations, but could improve transparency and security posture by publishing detailed policies and contact information.

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

4 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. 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 hc24.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.

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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
52
Security headers
25
Email security
85
DNS health
60
Network security
40
GDPR outside view
83
Average
58

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 hc24.de, from OffSeq Breach.

No leaked records found

Breach holds no records for hc24.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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

HC24 holds a niche market position in the real estate sector, focusing on furnished rentals for temporary stays. Its business model revolves around providing a digital marketplace that connects renters with verified furnished properties, offering convenience and transparency. Customer testimonials and a strong Google rating reinforce its credibility. The platform leverages social media channels for engagement and uses cookie consent tools to comply with GDPR. Growth potential lies in expanding listings and enhancing user trust through improved security and compliance disclosures.

Security posture

The website demonstrates a baseline security posture with HTTPS and cookie consent compliance. However, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces its defense-in-depth. No incident response or vulnerability disclosure information is publicly available, which may impact readiness for security events. No exposed sensitive data or vulnerable libraries were detected in the provided content. Enhancing security transparency and implementing recommended headers would strengthen the overall security maturity.

Recommendations

  1. Publish explicit privacy policy and terms of service pages linked from the homepage.
  2. Implement and configure security headers including CSP, HSTS, and X-Frame-Options.
  3. Provide clear contact information including company email and phone numbers for customer and security inquiries.
  4. Establish and publicize an incident response and vulnerability disclosure process.
  5. Enhance accessibility features to improve compliance and user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
HC24 GmbH & Co. KG
Description
HC24 offers furnished apartments, rooms, houses, and flats for rent on a temporary basis. They provide a platform to search and rent furnished accommodations with a focus on convenience and transparency.
Key services
Listing furnished apartments and rooms, Search and booking platform, Customer support and verification
Content quality
good
Branding
consistent

Technology

Stack
Next.js, React, CookieYes (cookie consent), Amazon S3 (media hosting)
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
YouTube cookies, Google Analytics cookies
Marketing tools
CookieYes consent management
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Cookie consent is implemented with detailed categories and user controls.
  3. No explicit privacy policy or terms of service pages found in provided content.
  4. Business information is partially available via JSON-LD structured data.
  5. Multiple customer testimonials and Google reviews indicate trustworthiness.
  6. Use of modern web technologies and hosting on AWS S3 for media.
  7. No direct contact emails or phone numbers found in the provided content.
  8. No security policy or incident response information publicly visible.
  9. No vulnerability disclosure or security.txt found.
  10. Website content is safe and suitable for general audiences.
Technical notes

Notes

The website uses a modern React-based framework (Next.js) with server-side rendering capabilities, contributing to good SEO and performance. Media assets are served from AWS S3, indicating scalable hosting infrastructure. Cookie consent is managed via CookieYes, a reputable consent management platform. The site is mobile optimized and has a clean, professional design. However, no CMS was explicitly detected, and some accessibility features appear basic. Performance is moderate, with room for optimization in loading times and accessibility compliance.
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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