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Security report for nextdoor.com

Nextdoor · Technology · United States

Low risk. 2 critical or high findings in GDPR outside view and SSL/TLS.

Security score

88/100

Risk levelLow

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

Nextdoor is a well-established social networking platform founded in 2004, focused on connecting neighborhood residents to share local tips, buy and sell items, and foster community engagement. The website reflects a mature business with consistent branding and a clear market position as a leading neighborhood hub. Technically, the site leverages modern JavaScript frameworks, cloud hosting via Amazon AWS, and integrates multiple marketing and analytics tools such as Google Tag Manager, Facebook Pixel, and Branch.io. Performance and mobile optimization are good, supporting a positive user experience. Security posture is strong with HTTPS enforced and domain registration protections in place, though DNSSEC is not enabled and explicit security headers were not detected in the provided content. Privacy compliance is an area for improvement, as no explicit privacy or cookie policies were found in the analyzed HTML content. Overall, the site is professional and trustworthy, with extensive user tracking and marketing technologies in use.

Scanned

NIS2 and GDPR posture

GDPR outside view
73/ 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. 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 nextdoor.com

This scan found 10 issues across 5 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

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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
85
Email security
100
DNS health
85
Network security
100
GDPR outside view
73
Average
88

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

Nextdoor operates in the technology sector as a social networking platform targeting neighborhood communities. Its business model centers on facilitating trusted local connections and marketplace activities. The company is large and mature, with a domain age consistent with its founding year. The platform's ecosystem includes multiple international localized domains, indicating a broad geographic reach. Marketing and advertising efforts are supported by major ad networks and tracking services, suggesting a revenue model that includes advertising. The absence of direct contact information in the analyzed content may indicate reliance on in-app support or other channels. The company maintains a consistent brand presence across social media platforms, enhancing its market credibility.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and domain registration protections such as clientDeleteProhibited and clientTransferProhibited statuses. However, DNSSEC is not enabled, which could be a potential area for DNS spoofing risk mitigation. No explicit security headers were identified in the provided content, and there is no visible security or incident response policy or contact information. The use of third-party tracking and marketing scripts introduces a moderate privacy risk. No vulnerabilities or exposed sensitive data were detected in the HTML content. The security score is good but could be improved by implementing DNSSEC, publishing security policies, and enhancing HTTP security headers.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish clear and accessible privacy and cookie policies on the website homepage or footer.
  3. Implement and publish a security.txt file or vulnerability disclosure policy to facilitate responsible reporting.
  4. Add explicit HTTP security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  5. Provide clear incident response contact information, including security and abuse email addresses, to improve transparency and trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nextdoor
Description
Nextdoor is the neighborhood hub for trusted connections and the exchange of helpful information, goods, and services.
Key services
local tips, buy and sell items, community connections
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Branch.io, Facebook Pixel, Bing Ads, Google Analytics, Google Sign-In
Performance
fast
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enabled
  • Domain status includes clientDeleteProhibited, clientTransferProhibited, clientUpdateProhibited
  • Use of Google Sign-In and Facebook domain verification meta tags

Analytics and tracking

Services
Google Analytics, Facebook Pixel, Bing Ads
Tracking level
extensive
Privacy practices
poor

Advertising

Ad networks
Bing Ads, Google Ads, Nextdoor Ads
Tracking pixels
Facebook Pixel, Branch.io
Marketing tools
Branch.io, Facebook Pixel
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 challenge
  2. No explicit privacy, cookie, or terms of service policies found in the provided HTML content
  3. Strong use of modern tracking and marketing technologies
  4. Good branding consistency and professional design
  5. No direct contact emails or phone numbers found in the HTML content
  6. Domain registration is stable and consistent with business claims
  7. No security.txt or vulnerability disclosure policy detected
Technical notes

Notes

The website is hosted on Amazon AWS infrastructure with Cloudfront CDN, ensuring reliable and scalable delivery. The tech stack includes modern JavaScript frameworks (likely React), Google Tag Manager, Facebook Pixel, and Branch.io for analytics and marketing. The site is optimized for performance and mobile devices, with preloading of fonts and scripts. SEO is supported by comprehensive meta tags including Open Graph and Twitter Cards. Accessibility is basic but present. There is no detected CMS, indicating a custom or proprietary platform. The technical implementation is modern and robust, supporting a high-quality user experience with minimal technical debt.
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. 88/100Low18 findingsView report
  2. 88/100 +3Low18 findingsView report
  3. 85/100Low20 findingsView report
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