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Security report for redfin.com

Redfin · Real Estate · United States

Low risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

78/100

Risk levelLow

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

Redfin is a leading real estate platform in the United States offering comprehensive services including home buying, selling, rentals, mortgage services, and access to local real estate agents. The website is professionally designed with excellent content quality and user experience, targeting home buyers, sellers, renters, and mortgage seekers. The platform leverages modern web technologies such as React and integrates multiple analytics and marketing tools to optimize user engagement and business operations. Security posture is strong with HTTPS enforcement, appropriate security headers, and use of AWS WAF, although explicit security policies and incident response contacts are not published. Privacy compliance is well addressed with comprehensive privacy and cookie policies and consent mechanisms. The absence of WHOIS data is noted but does not detract from the site's legitimacy given its brand recognition and operational scale.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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. GDPR outside view

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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. 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 redfin.com

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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Recommended

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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
82
Security headers
45
Email security
87
DNS health
85
Network security
100
GDPR outside view
68
Average
78

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

Redfin operates as an essential entity in the real estate sector, providing an integrated online marketplace and brokerage services. Its competitive advantage lies in proprietary technology, a large network of experienced agents, and a diversified business model that includes mortgage and rental services. The company targets a broad customer base across the US housing market and maintains a strong partnership ecosystem with mortgage and title service providers. Growth indicators include active experimentation with user experience and marketing optimizations as seen in bouncer flags and feature toggles. The platform's strategic focus on technology-driven real estate services positions it well in a competitive market.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, presence of key security headers, and integration of AWS WAF for protection. No vulnerabilities or exposed sensitive data were detected in the analyzed content. However, the lack of published security policies, incident response contacts, and vulnerability disclosure mechanisms indicates room for improvement in transparency and readiness. Compliance with GDPR is implied through privacy and cookie policies, but explicit statements or certifications are not found. Overall, the security culture appears strong but could benefit from enhanced communication and formalized security governance documentation.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and compliance frameworks.
  2. Provide clear incident response contact information including security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Enhance accessibility features to meet or exceed WCAG standards for broader inclusivity.
  5. Regularly audit and minimize third-party scripts to reduce potential attack surface and improve performance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Redfin
Description
Search national real estate and rental listings. Find the latest apartments for rent and homes for sale near you. Tour homes and make offers with the help of local Redfin real estate agents.
Key services
Home buying, Home selling, Rentals, Mortgage services, Real estate agent services
Content quality
excellent
Branding
consistent

Technology

Stack
React, JavaScript, Google Tag Manager, Google Analytics, Bing Ads, Facebook SDK, TikTok Pixel, AWS WAF SDK, CookieLaw.org CMP
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • No exposed sensitive data detected
  • Use of AWS WAF challenge script

Analytics and tracking

Services
Google Analytics, Scorecard Research
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Bing Ads, Google Ads
Tracking pixels
TikTok Pixel, Facebook Pixel, Scorecard Research
Marketing tools
Facebook SDK, TikTok Pixel
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 interactive features
  2. Strong use of modern web technologies and analytics
  3. Comprehensive privacy and cookie policies with consent mechanisms
  4. No direct contact emails or phone numbers found on homepage HTML
  5. No explicit security policy or incident response contacts published
  6. No vulnerability disclosure or security.txt found
  7. WHOIS data unavailable, but website is a known brand
  8. No adult or NSFW content detected
  9. Good SEO and accessibility practices observed
Technical notes

Notes

Redfin's technical infrastructure is modern and robust, utilizing React for frontend rendering and integrating multiple third-party analytics and marketing tools such as Google Analytics, Facebook SDK, and TikTok Pixel. The site is optimized for performance and mobile responsiveness, with good SEO practices including meta tags and structured data (JSON-LD). Security is enhanced by AWS WAF integration and appropriate HTTP headers. The use of cookie consent management via cookielaw.org indicates compliance with privacy regulations. Hosting details are not explicitly identified but likely involve enterprise-grade providers given the scale. Opportunities exist to improve technical documentation and reduce reliance on multiple external scripts to streamline performance and security.
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. 76/100Low23 findingsView report
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