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Security report for oreilly.com

O'Reilly Media · Education · N/a

Low risk. 2 critical or high findings in GDPR outside view.

Security score

84/100

Risk levelLow

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

O'Reilly Media is a well-established company specializing in technology and business training through a variety of learning resources including live online training, video courses, and books. The company positions itself as a leader in the education sector, targeting technology and business professionals seeking to enhance their skills. The website reflects a professional and consistent brand image with high-quality content curated from over 200 publishers. Technically, the site employs modern analytics and marketing tools such as Google Tag Manager and Visual Website Optimizer, indicating a mature digital infrastructure. Security posture appears adequate with HTTPS usage and no visible sensitive data exposure, though explicit security headers and policies are not evident in the provided content. Privacy compliance is limited by the absence of visible privacy and cookie policies, which should be addressed to improve user trust and regulatory adherence. Overall, the website is professional and trustworthy, but domain registration data is unavailable from the WHOIS query, which slightly impacts the trust assessment.

Scanned

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

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

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 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

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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
100
Security headers
75
Email security
80
DNS health
90
Network security
100
GDPR outside view
58
Average
84

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention oreilly.com, from OffSeq Breach.

Total records
83,072
Employees
0
Customers
83,022
Third parties
50
Weak passwords
8%

62 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for oreilly.com.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

O'Reilly Media operates primarily in the education sector, offering technology and business training content through a subscription and content sales model. The company targets professionals and learners in technology and business fields, leveraging a broad content library from numerous publishers. The website's market position is strong, supported by consistent branding and high-quality content. The business model focuses on digital learning resources, live training, and books, catering to a global audience. The absence of explicit contact information and privacy policies on the site suggests areas for improvement in customer engagement and compliance. The company likely has a large operational scale given the content volume and technical sophistication observed.

Security posture

The website uses HTTPS and integrates reputable third-party analytics and marketing tools, which is positive for security and performance. However, the lack of visible security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options indicates room for improvement in hardening the site against common web attacks. No forms or input fields were detected in the provided content, reducing immediate risk from input-based vulnerabilities. The absence of published security policies or incident response information limits transparency and preparedness perception. Regular audits of third-party scripts and implementation of comprehensive security headers are recommended to enhance the security posture.

Recommendations

  1. Publish clear and comprehensive privacy and cookie policies to improve GDPR compliance and user trust.
  2. Implement and verify security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Provide explicit contact information including support emails and phone numbers to enhance business credibility.
  4. Conduct regular security audits of third-party scripts and dependencies to mitigate vulnerabilities.
  5. Develop and publish incident response and vulnerability disclosure policies to demonstrate security maturity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
O'Reilly Media
Description
Gain technology and business knowledge and hone your skills with learning resources created and curated by O'Reilly's experts: live online training, video, books, our platform has content from 200+ of the world's best publishers.
Key services
Live online training, Video courses, Books, Learning platform with content from 200+ publishers
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, Visual Website Optimizer (VWO), jQuery, Kaltura video player
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • Use of HTTPS (implied by https URLs in scripts and images)
  • No exposed sensitive data detected in HTML content

Analytics and tracking

Services
Google Tag Manager, Visual Website Optimizer
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Visual Website Optimizer
Marketing tools
Visual Website Optimizer
Transparency
basic

Site quality

Design
excellent
User experience
good
Content relevance
excellent
Navigation
good
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website content is fully accessible with no blocking or WAF challenge detected.
  2. WHOIS data is missing or unavailable from the queried source, limiting domain registration verification.
  3. Website uses multiple third-party analytics and marketing tools including Google Tag Manager and Visual Website Optimizer.
  4. No explicit privacy, cookie, or terms of service policies were found in the provided HTML content.
  5. No contact emails, phone numbers, or physical addresses were found in the provided content.
  6. Website content and branding are professional and consistent with a large education and technology training company.
  7. No security headers or explicit security policies were detected in the HTML content.
  8. No forms were detected in the provided HTML snippet.
  9. Social media presence is indicated by Twitter handle @OReillyMedia in meta tags.
Technical notes

Notes

The website employs a modern technology stack including Google Tag Manager for analytics and Visual Website Optimizer for A/B testing and user experience optimization. The use of Kaltura indicates video content delivery capabilities. The site appears mobile-optimized with responsive design elements, though accessibility features are basic and could be enhanced. Performance is moderate, likely influenced by multiple third-party scripts. No CMS or hosting provider information was detected. The site structure and meta tags support good SEO practices. Opportunities exist to improve accessibility compliance and reduce technical debt by optimizing script loading and enhancing security configurations.
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. 83/100Low18 findingsView report
  2. 83/100Low18 findingsView report
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