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Security report for react.dev

Facebook, Inc. · Technology · United States

Medium risk. 7 critical or high findings in Email security, Security headers and 2 other checks.

Security score

62/100

Risk levelMedium

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

React.dev is the official website for React, a leading JavaScript library for building web and native user interfaces, maintained by Meta Platforms, Inc. The site provides comprehensive documentation, learning resources, and community engagement tools targeting web developers and software engineers globally. It positions React as a foundational technology in modern frontend development with strong industry adoption and ecosystem support. The website demonstrates a mature technical infrastructure leveraging React and Next.js frameworks, optimized for performance, accessibility, and SEO. Security posture is strong with HTTPS enforcement and security headers, though explicit privacy and cookie policies are absent. Overall, the site reflects a professional and trustworthy digital presence aligned with Meta's standards.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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

7 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  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 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 Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

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

Keep watching react.dev

This scan found 26 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.

Daily monitoring

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
72
Security headers
30
Email security
40
DNS health
75
Network security
100
GDPR outside view
53
Average
62

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

React.dev operates as an open-source project under Meta Platforms, serving a global developer audience. Its business model centers on community-driven development and ecosystem growth rather than direct monetization. The site links to partner frameworks like Next.js and React Router, indicating strategic ecosystem partnerships. The content quality and technical sophistication support React's market leadership and competitive advantage in frontend development. Absence of direct contact or business transactional information aligns with its role as a technology resource rather than a commercial storefront.

Security posture

The website exhibits a high security maturity level with HTTPS, modern security headers, and no visible vulnerabilities or exposed sensitive data. However, it lacks published security policies, incident response contacts, and vulnerability disclosure mechanisms, which are important for transparency and compliance. The use of Google Tag Manager introduces moderate user tracking, but no privacy consent mechanisms were detected. Compliance with GDPR and other privacy regulations could be improved by adding explicit policies and consent banners. Overall, the security posture is robust but could benefit from enhanced privacy and incident response disclosures.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy with GDPR compliance details.
  2. Implement a cookie consent mechanism to inform users and obtain consent for tracking.
  3. Add a dedicated security policy page including incident response contacts and vulnerability disclosure guidelines.
  4. Provide clear contact information for data protection officer or security team to enhance trust.
  5. Regularly audit third-party scripts and dependencies to maintain security and privacy standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Facebook, Inc.
Description
React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations.
Key services
React JavaScript library, Documentation and learning resources, Community engagement, Links to related frameworks like Next.js and React Router
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, React, Next.js, Algolia (search), Google Tag Manager, CSS, SVG
Frameworks
React, Next.js
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries
  • Secure forms with no suspicious inputs

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
basic

Advertising

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 no blocking or WAF challenges.
  2. Content is comprehensive, well-structured, and professionally presented.
  3. No explicit privacy, cookie, or terms of service policies found on the main page.
  4. No direct contact emails, phone numbers, or physical addresses found in the content.
  5. Strong use of modern web technologies and frameworks.
  6. Security best practices are observed with HTTPS and security headers.
  7. Analytics and tracking are implemented via Google Tag Manager.
  8. Multiple language alternate links indicate global audience targeting.
  9. Social media presence confirmed via Twitter @reactjs and GitHub repository links.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, ensuring fast performance and excellent mobile optimization. The use of Algolia for search and Google Tag Manager for analytics reflects a mature technical stack. The site is well-structured with proper meta tags, SEO optimization, and accessibility features. Hosting details are not explicit but likely leverage Meta's infrastructure. No CMS detected, indicating a custom or static site generation approach. Technical risks are minimal, with opportunities to enhance privacy compliance and security transparency.
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. 62/100Medium35 findingsView report
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