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Security report for nextdoor.co.uk

Nextdoor · Technology · United Kingdom

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

Security score

83/100

Risk levelLow

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

Nextdoor is a well-established social networking platform focused on local neighbourhood communities, primarily serving the United Kingdom in this instance. The platform enables users to share local tips, buy and sell items, and engage with their neighbours, positioning itself as a key player in the local community technology sector. The website demonstrates consistent branding and a professional design, targeting local residents and community members. Technically, the site uses modern web technologies including React, Google Tag Manager, and Amazon Cloudfront CDN, indicating a mature and scalable infrastructure. Mobile optimization and SEO practices appear adequate, supporting a good user experience. Security-wise, the site uses HTTPS and includes domain verification meta tags, but lacks visible security headers and explicit security policies or incident response contacts, which are areas for improvement. Privacy compliance is limited in the provided content, with no explicit privacy or cookie policies detected, which may pose compliance risks. Overall, the domain registration data supports the legitimacy of the business, showing a long-standing registration consistent with the company's history. Strategic recommendations include enhancing privacy and security disclosures, implementing security headers, and publishing vulnerability disclosure information to improve trust and compliance.

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.co.uk

This scan found 15 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
82
Security headers
85
Email security
85
DNS health
70
Network security
100
GDPR outside view
73
Average
83

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 for neighbourhoods, with a business model likely based on advertising and business services. It targets local communities in the UK and internationally, leveraging a strong brand presence and social media integration. The company is mature, founded in 1999, and maintains consistent domain registration details. The platform's competitive advantage lies in its localized community focus and established user base. Growth indicators include multiple country-specific domains and active social media channels. The partnership ecosystem includes major platforms like Google and Facebook for verification and sign-in services. No direct contact or support channels were found in the analyzed content, which could be a strategic area to enhance customer engagement and trust.

Security posture

The website demonstrates a moderate security posture with HTTPS enabled and domain verification meta tags for Google and Facebook, which are positive trust signals. However, the absence of visible security headers such as Content-Security-Policy, X-Frame-Options, and others reduces the overall security maturity. There is no evidence of a published security policy, incident response contacts, or vulnerability disclosure mechanisms, which are important for transparency and readiness. No exposed sensitive data or vulnerable libraries were detected in the provided content. The site should improve by implementing comprehensive security headers, publishing security policies, and establishing clear incident response channels to enhance its security culture and compliance with regulations like GDPR and NIS2.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-XSS-Protection.
  2. Publish a comprehensive privacy policy and cookie consent mechanism to improve GDPR compliance.
  3. Establish and publicize a security policy and incident response contact information.
  4. Create and maintain a vulnerability disclosure program or security.txt file.
  5. Enhance accessibility features and conduct regular security audits to maintain a strong security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Nextdoor
Description
Nextdoor is an app and website for neighbourhoods where users can get local tips, buy and sell items, and more. It is used by many communities throughout the United Kingdom to strengthen their neighbourhoods.
Key services
Local tips sharing, Buying and selling items, Neighbourhood social networking
Content quality
good
Branding
consistent

Technology

Stack
React (implied by react-datepicker CSS), Google Tag Manager, Google Sign-In, Cloudfront CDN, Privacy Center SDK
Frameworks
React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of HTTPS (implied by https URLs)
  • Google and Facebook domain verification meta tags

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Marketing tools
Privacy Center SDK
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 pages found in the provided HTML snippet.
  3. Strong branding and consistent use of fonts and colors.
  4. Use of modern web technologies and CDNs.
  5. Presence of social media and verification meta tags indicates legitimacy.
  6. No direct contact emails or phone numbers found in the HTML snippet.
  7. No security.txt or vulnerability disclosure information found.
  8. No explicit security policy or incident response contact information found.
Technical notes

Notes

The website uses a modern technology stack with React as the front-end framework, supported by Google Tag Manager for analytics and Amazon Cloudfront as the CDN for content delivery. The presence of Google Sign-In indicates integration with third-party authentication services. Performance is moderate with preloading of fonts and scripts to optimize loading times. Mobile optimization is good, with responsive design elements and viewport meta tags. Accessibility is basic but could be improved with more explicit ARIA roles and semantic HTML. SEO is supported by proper meta tags including Open Graph and Twitter cards, as well as structured data in JSON-LD format describing the organization. Technical risks include the lack of visible security headers and incomplete privacy compliance disclosures.
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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