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Security report for yelp.ch

Yelp · Retail · Switzerland

Medium risk. 2 critical or high findings in GDPR outside view and DNS health.

Security score

67/100

Risk levelMedium

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

Yelp.ch is a localized German-language website serving the Swiss market, providing user-generated reviews and recommendations for local businesses such as restaurants, shopping, nightlife, and wellness services. The platform operates under Yelp Inc., a well-established company founded in 2004, with a strong market position as a leading local business review platform. The website offers extensive business listings, search functionality, and advertising services for business owners. Technically, the site uses modern web technologies including React and GraphQL, hosted primarily on Amazon AWS infrastructure. However, performance is hindered by slow load times and a large page size. Security posture is weakened by an invalid SSL certificate and lack of HTTPS enforcement, absence of security headers, and no HSTS policy, which are critical areas for improvement. Privacy compliance is strong, with comprehensive privacy and cookie policies and GDPR adherence. Overall, the site is professional, trustworthy, and content-rich but requires urgent security enhancements to protect users and maintain trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 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

2 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.

    • 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

  2. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Unregistered MX Record

      MX record points to unregistered domain: corpmx.yelpcorp.com

      What to do: Remove or fix MX record pointing to unregistered domain

      • RFC 5321 §5.1
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

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This scan found 13 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
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  • 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
50
Security headers
75
Email security
50
DNS health
70
Network security
100
GDPR outside view
58
Average
67

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

Yelp operates a global online review platform with a business model centered on user-generated content and monetization through advertising and business tools. The Swiss localized site targets consumers seeking reliable local business information and businesses aiming to increase visibility and customer engagement. Yelp's competitive advantage lies in its extensive user base, verified business data, and integrated advertising solutions. The platform supports multiple languages and countries, indicating a mature international presence. Growth is supported by continuous feature enhancements and partnerships. The business ecosystem includes related domains for business owners and trust & safety. The company maintains a consistent brand and high content quality, reinforcing its market leadership in local business reviews.

Security posture

The current security maturity level is moderate but compromised by critical issues such as an invalid SSL certificate and lack of HTTPS enforcement, which expose users to potential man-in-the-middle attacks. The absence of security headers and HSTS reduces protection against common web attacks. No known vulnerabilities in libraries or exposed sensitive data were detected. Privacy policies and cookie consent mechanisms are well implemented, supporting GDPR compliance. Incident response and vulnerability disclosure information are not publicly available, indicating room for improvement in transparency and readiness. Overall, the security culture appears established but requires immediate remediation of SSL and header configurations to enhance user trust and data protection.

Recommendations

  1. Urgently fix and properly configure SSL certificates to enable HTTPS across the site.
  2. Implement HTTP Strict Transport Security (HSTS) with includeSubDomains and preload directives.
  3. Add essential security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  4. Improve page load performance by optimizing resource sizes and reducing load time.
  5. Publish clear security policies and incident response contact information to enhance transparency and trust.
Technical notes

Notes

The website employs a modern technology stack with React and GraphQL, leveraging CDN and AWS hosting for scalability. The site is mobile-optimized and accessible with good SEO practices. However, the page load time is significantly slow (over 31 seconds) with a large page size (~1.4 MB) and many resources (279), indicating technical debt and optimization opportunities. The SSL configuration is currently invalid, disabling HTTPS benefits. No CMS detected, suggesting a custom-built platform. The site uses third-party scripts for cookie consent and analytics, with Google Analytics disabled. Overall, the technical infrastructure is robust but requires performance and security improvements to reduce risks and enhance user experience.
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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