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Security report for airbnb.com.tw

Airbnb · Real Estate · Taiwan

Medium risk. 8 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

52/100

Risk levelMedium

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

Airbnb is a leading global online marketplace specializing in vacation home rentals, unique experiences, and related services. The website targets a broad audience seeking travel accommodations and experiences, offering millions of listings worldwide. The platform is well-established with a strong market position and a comprehensive service offering. Technically, the site leverages modern web technologies including React, Google Analytics, and map services like Mapbox and Gaode, ensuring a fast and responsive user experience optimized for mobile devices. Security posture is solid with HTTPS enforced and some security best practices in place, though explicit security headers and policy disclosures are limited in the provided content. Privacy compliance is basic, lacking visible privacy and cookie policies or consent mechanisms. Overall, the site demonstrates high professionalism and trustworthiness, with room for improvement in privacy transparency and security policy communication.

Scanned

This is an earlier scan of airbnb.com.tw. View the latest report

NIS2 and GDPR posture

GDPR outside view
35/ 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

8 findings 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  2. 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 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';…

  3. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

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

Keep watching airbnb.com.tw

This scan found 19 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
0
Security headers
15
Email security
70
DNS health
90
Network security
100
GDPR outside view
35
Average
52

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

Airbnb operates in the real estate and hospitality sectors as an essential entity with an enterprise scale. Its business model revolves around connecting hosts and guests via an online platform, generating revenue through service fees. The company maintains a strong brand with consistent design and trust signals such as HTTPS and structured data. The platform supports a wide geographic reach including Taiwan, with localized content and language support. While direct contact information and detailed corporate data are not visible in the HTML snapshot, the domain registration and technical infrastructure align with a reputable global enterprise. The ecosystem includes integrations with major analytics and mapping providers, supporting data-driven marketing and user engagement.

Security posture

The website enforces HTTPS and employs CSRF tokens and script isolation techniques (Partytown) to enhance security. However, the absence of explicit security headers like HSTS, X-Content-Type-Options, and X-Frame-Options in the HTML meta tags suggests potential areas for strengthening defense-in-depth. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The lack of a published security policy or incident response contact information limits transparency and may impact user trust and compliance readiness. Overall, the security posture is good but could benefit from enhanced policy disclosures and header implementations.

Recommendations

  1. Publish comprehensive privacy and cookie policies with clear consent mechanisms to improve privacy compliance.
  2. Implement and disclose a formal security policy and incident response contacts to enhance transparency and trust.
  3. Add security headers such as Strict-Transport-Security, X-Content-Type-Options, and X-Frame-Options to strengthen security posture.
  4. Establish a vulnerability disclosure program and security.txt file to encourage responsible reporting and compliance.
  5. Enhance visibility of official contact information for security and compliance inquiries to improve user confidence.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Airbnb
Description
為各種旅程預訂 Airbnb → 700 萬間度假屋 → 200 萬間旅客精選房源 → 遍及全球超過 220 個國家與地區
Key services
Vacation home rentals, Experiences, Services
Content quality
excellent
Branding
consistent

Technology

Stack
React 18.3.1, JavaScript, CSS, Google Tag Manager, Google Analytics, Partytown (for script offloading), Mapbox, Gaode Map API, D3.js
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security tokens (CSRF tokens present)
  • Content Security Policy via Twitter widgets CSP meta tag
  • Use of Partytown for script isolation

Analytics and tracking

Services
Google Analytics, Google Tag Manager, Bugsnag
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Bugsnag
Transparency
basic

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 frameworks.
  3. No explicit privacy or cookie policies found in the provided HTML snapshot.
  4. No direct contact emails or phone numbers visible in the main HTML content.
  5. Security best practices partially implemented; room for improvement in security headers and policy disclosures.
  6. No signs of suspicious or malicious content.
  7. Branding and design are consistent and professional.
  8. Use of multiple external trusted domains for analytics and maps.
Technical notes

Notes

The website is built on a modern React framework (version 18.3.1) with extensive use of JavaScript and CSS for a rich, interactive user experience. It integrates multiple third-party services including Google Tag Manager, Google Analytics, Bugsnag for error reporting, and map services like Mapbox and Gaode. The use of Partytown indicates an advanced approach to offloading third-party scripts for performance and security. The site is mobile-optimized with responsive design and accessibility features. Hosting and domain registration are managed by reputable providers, ensuring stability and legitimacy. Performance is fast with preloading of critical assets and optimized resource loading. Technical debt appears low with current technologies and frameworks in use, though continuous monitoring for library vulnerabilities is recommended.
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. 62/100 −11Medium29 findingsView report
  2. 73/100Medium24 findingsView report
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