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Security report for udemy.com

Udemy, Inc. · Education · United States

Low risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

76/100

Risk levelLow

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

Udemy, Inc. operates one of the world's largest online learning marketplaces, offering over 250,000 courses to more than 80 million students globally. The platform targets individual learners, professionals, and enterprises seeking skill development and certification preparation. Udemy's business model combines direct course sales with subscription plans for individuals and businesses, positioning it as a leader in the online education sector. The website demonstrates a mature digital infrastructure leveraging modern web frameworks such as React and Next.js, supported by extensive analytics and marketing tools. Security posture is strong with HTTPS enforcement, comprehensive security headers, and privacy compliance including GDPR. The absence of public WHOIS data is likely due to privacy protection but does not detract from the platform's legitimacy given its global recognition and trust indicators. Overall, Udemy presents a professional, secure, and user-friendly online presence aligned with its market leadership in e-learning.

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

5 findings rated critical or high. Fix these first.

  1. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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';…

  2. 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

  3. 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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching udemy.com

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.

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

Email alerts on material changes and an exportable JSON history of every change.

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Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
75
Security headers
45
Email security
95
DNS health
85
Network security
100
GDPR outside view
58
Average
76

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

Udemy holds a significant market position as a leading online education provider with a broad course catalog spanning technology, business, design, and personal development. Its competitive advantage lies in its extensive course offerings, AI-powered learning tools, and enterprise solutions via Udemy Business. Revenue streams include course purchases, subscription plans, and corporate training programs. The platform serves diverse customer segments from individual learners to large organizations, supported by partnerships with major corporations. Growth indicators include a large user base, high course enrollment numbers, and positive user testimonials. Strategic observations highlight Udemy's focus on career acceleration and certification prep, catering to evolving workforce demands.

Security posture

Udemy exhibits a robust security posture with enforced HTTPS, modern security headers, and secure form handling. The site integrates a consent management platform for cookie compliance and employs reputable third-party services for analytics and marketing. No exposed sensitive data or vulnerable libraries were detected in the analysis. However, the absence of a publicly disclosed vulnerability disclosure policy and security.txt file suggests room for improvement in transparency and incident response readiness. Compliance with GDPR is evident through privacy policies and cookie consent mechanisms. Overall, the security maturity is high, suitable for a platform handling millions of users and transactions.

Recommendations

  1. Publish a formal vulnerability disclosure policy and security.txt file to enhance transparency and facilitate responsible reporting.
  2. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  3. Enhance visibility of incident response contacts, including dedicated security or abuse email addresses.
  4. Continue to monitor and improve privacy compliance, especially with evolving regulations like NIS2.
  5. Invest in ongoing security awareness and training to maintain a strong security culture across the organization.

Contact details published on the site

Addresses
Legal name
Udemy, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Udemy, Inc.
Description
Udemy is an online learning and teaching marketplace with over 250,000 courses and 80 million students. Learn programming, marketing, data science and more.
Key services
Online courses across multiple categories, Career Accelerators, Udemy Business for teams and enterprises, Certification preparation, AI-powered learning tools
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, GraphQL, Webpack, Google Tag Manager, Google Analytics, Facebook SDK, Cookielaw.org Consent Management, Branch Metrics, Pusher, Filestack, PayPal SDK
Frameworks
Next.js, React
Platforms
Web, Android, iOS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Use of modern security headers
  • No exposed sensitive data in HTML
  • Secure forms with CSRF protections implied
  • Use of consent management for cookies

Analytics and tracking

Services
Google Analytics, Facebook Analytics, Braze
Tracking level
extensive
Privacy practices
good

Advertising

Tracking pixels
Facebook Pixel, Braze Web Push
Marketing tools
Branch Metrics, Sift, Pendo (disabled), Extole (disabled)
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 no blocking detected
  2. Strong branding and professional design consistent with a major online education platform
  3. Comprehensive course offerings and business plans clearly presented
  4. Multiple trust indicators including testimonials, partner logos, and certifications
  5. Use of modern web technologies and security best practices
  6. Privacy and cookie policies are present and GDPR compliant
  7. No exposed sensitive data or obvious security vulnerabilities found
  8. WHOIS data is missing, likely due to privacy protection or registry policies
Technical notes

Notes

Udemy's technical infrastructure is built on modern, scalable web technologies including React and Next.js, enabling fast and responsive user experiences across devices. The use of GraphQL APIs and CDN-hosted assets supports efficient content delivery. Integration with multiple analytics and marketing platforms indicates a mature digital marketing strategy. Performance is optimized with preconnects, preloads, and asynchronous script loading. Accessibility features and SEO optimizations are well implemented, contributing to broad reach and usability. Technical risks are minimal, though continuous monitoring of third-party dependencies is recommended to avoid supply chain vulnerabilities.
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. 79/100 −2Low20 findingsView report
  2. 81/100Low19 findingsView report
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