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Security report for linkedin.com

LinkedIn · Technology · N/a

Low risk. 1 critical or high finding in GDPR outside view.

Security score

87/100

Risk levelLow

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

LinkedIn operates as a leading global professional networking platform, serving over a billion members worldwide. It enables users to manage professional identities, build networks, access job opportunities, and engage in online learning. The platform targets professionals, job seekers, businesses, and recruiters, offering a freemium business model with premium services for talent solutions, marketing, and sales. LinkedIn holds a dominant market position in the technology sector for professional social networking. Technically, LinkedIn employs a modern web infrastructure with extensive use of JavaScript, React framework, and third-party authentication services such as Google and Microsoft OAuth. The site is optimized for performance, mobile responsiveness, and accessibility, leveraging CDNs and lazy loading techniques. SEO and metadata are well implemented, supporting strong discoverability. From a security perspective, LinkedIn enforces HTTPS, uses secure login forms with CSRF protection, and implements cookie consent mechanisms. Security headers are likely in place, and the platform integrates trusted third-party authentication providers. No vulnerabilities or exposed sensitive data were detected in the analyzed content. However, explicit incident response contacts and vulnerability disclosure mechanisms are not visible, suggesting areas for improvement. Overall, LinkedIn presents a highly professional, secure, and privacy-conscious web presence consistent with its enterprise stature. The lack of WHOIS data is typical for large brands employing privacy protection. The website is safe for general audiences, with no adult or questionable content. Strategic recommendations include enhancing transparency around security incident response and publishing a security.txt file to facilitate vulnerability reporting.

Scanned

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

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

1 finding 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

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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
95
Security headers
75
Email security
90
DNS health
90
Network security
100
GDPR outside view
73
Average
87

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

LinkedIn's market positioning as the premier professional networking platform is supported by its extensive service offerings including job search, talent acquisition, online learning, and marketing solutions. Its business model combines free access with premium paid services targeting enterprises and professionals. The platform's global reach and localized content demonstrate a mature partnership ecosystem and strong growth indicators. LinkedIn's operations emphasize user engagement, data-driven marketing, and continuous content curation, maintaining competitive advantages in network effects and brand recognition.

Security posture

LinkedIn exhibits a mature security posture with enforced HTTPS, secure authentication flows, and cookie consent compliance. The platform integrates industry-standard OAuth providers and likely employs comprehensive security headers. No direct vulnerabilities or exposed sensitive information were found. However, the absence of publicly visible incident response contacts and vulnerability disclosure policies indicates potential gaps in transparency and community engagement. Compliance with GDPR is evident through privacy policies and consent mechanisms. Overall, LinkedIn maintains a robust security culture aligned with enterprise expectations.

Recommendations

  1. Publish a security.txt file to provide clear vulnerability disclosure instructions.
  2. Enhance visibility of incident response contacts and security policies for transparency.
  3. Regularly audit and update third-party scripts and authentication libraries.
  4. Explicitly document data retention policies and user privacy controls.
  5. Continue improving accessibility and mobile optimization to maintain user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
LinkedIn
Description
1 billion members | Manage your professional identity. Build and engage with your professional network. Access knowledge, insights and opportunities.
Key services
Professional networking, Job search and recruitment, Online learning, Talent solutions, Marketing and sales solutions
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Identity Services, Microsoft Authentication, SVG icons, Lazy loading, CDN usage (static.licdn.com)
Frameworks
React (implied)
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Secure login forms with CSRF tokens
  • Use of Google and Microsoft OAuth for authentication
  • Cookie consent banner with accept/reject options

Analytics and tracking

Services
LinkedIn Analytics, Google Analytics (implied)
Tracking level
extensive
Privacy practices
good

Advertising

Tracking pixels
LinkedIn Insight Tag (implied), Google Analytics (implied)
Marketing tools
LinkedIn Marketing Solutions
Transparency
good

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 professional design.
  2. Strong presence of privacy and cookie policies with consent mechanisms.
  3. Multiple authentication options including Google and Microsoft OAuth.
  4. No contact emails or phone numbers explicitly listed on homepage.
  5. No visible security.txt or explicit vulnerability disclosure page.
  6. WHOIS data is unavailable or privacy protected, common for large brands.
  7. No signs of WAF blocking or security challenges.
  8. Content is safe and targeted at professional users.
  9. Extensive use of tracking and analytics consistent with marketing goals.
Technical notes

Notes

The website leverages a modern tech stack centered around JavaScript and React, supported by CDNs for static content delivery. Authentication is handled via Google and Microsoft OAuth integrations, enhancing security and user convenience. Performance optimizations include lazy loading and responsive design. SEO metadata and Open Graph tags are well implemented, supporting social sharing and search engine indexing. No CMS is explicitly detected, suggesting a custom or proprietary platform. Hosting details are not disclosed but likely involve enterprise-grade cloud infrastructure. Technical risks are minimal, with opportunities for further modernization in security transparency and incident response.
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. 84/100 −3Low18 findingsView report
  2. 87/100Low17 findingsView report
  3. 87/100Low17 findingsView report
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