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Security report for ublockorigin.com

uBlock Origin · Technology · N/a

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

64/100

Risk levelMedium

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

uBlock Origin is a well-established open-source browser extension focused on ad and content blocking with an emphasis on CPU and memory efficiency. It enjoys a strong market position with millions of active users across major browsers including Chrome, Firefox, Edge, Opera, and Safari (prior to version 13). The project is led by founder Raymond Hill and maintained actively with a transparent development process hosted on GitHub. The website reflects a professional, clean, and user-friendly design with multilingual support and clear calls to action for downloading the extension. Technically, the website uses modern web standards including HTML5, CSS3, JavaScript, and jQuery, hosted behind Cloudflare DNS services. It is optimized for performance and mobile responsiveness, with good SEO and accessibility features. However, some security best practices such as DNSSEC and security headers are not implemented, and no explicit privacy or cookie policies are published, which could be improved to enhance compliance and user trust. From a security perspective, the site enforces HTTPS and has domain registration protections in place, but lacks formal incident response or vulnerability disclosure mechanisms. No tracking or advertising scripts are present, aligning with the privacy-centric nature of the product. Overall, the security posture is solid but could benefit from additional transparency and technical enhancements. The overall risk assessment is low given the open-source nature, transparent domain registration, and absence of suspicious indicators. Strategic recommendations include publishing privacy and cookie policies, enabling DNSSEC, adding security headers, and providing clear vulnerability reporting channels to further strengthen trust and compliance.

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

6 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 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';…

  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

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

Keep watching ublockorigin.com

This scan found 24 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
60
Security headers
15
Email security
75
DNS health
80
Network security
100
GDPR outside view
53
Average
64

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

uBlock Origin operates as an open-source software project targeting users who seek efficient and privacy-respecting ad blocking solutions. Its business model is non-commercial, refusing donations directly and instead encouraging support for block list maintainers. The project has demonstrated rapid growth historically and maintains a strong community presence on GitHub and Reddit. Its competitive advantage lies in its wide browser support, resource efficiency, and commitment to user privacy. The ecosystem includes partnerships with block list providers and community contributors. The website and project leadership maintain a consistent brand and messaging focused on transparency and user empowerment.

Security posture

The security maturity of uBlock Origin's website and project is moderate to good. HTTPS is enforced, and domain registration includes protections against unauthorized changes. However, the absence of DNSSEC and security headers reduces the overall security hardening. No privacy or cookie policies are published, which is a compliance gap under GDPR and similar regulations. Incident response and vulnerability disclosure mechanisms are not publicly documented, which could delay handling of security issues. The lack of tracking and advertising scripts is a positive privacy indicator. Overall, the security culture appears focused on privacy and transparency but would benefit from formalized policies and technical improvements.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy to improve GDPR compliance and user trust.
  2. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  3. Implement security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to harden the website against common attacks.
  4. Create and publish a security.txt file or dedicated vulnerability disclosure page to facilitate responsible reporting and incident response.
  5. Consider adding contact information for a Data Protection Officer or privacy contact to improve compliance and transparency.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
uBlock Origin
Description
uBlock Origin is a free, open-source, cross-platform browser extension for content filtering, primarily aimed at blocking ads and protecting privacy with CPU and memory efficiency.
Key services
Ad blocking, Content filtering, Privacy protection
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery 3.5.1, Google Fonts (Roboto)
Platforms
Chrome, Chromium, Microsoft Edge, Opera, Firefox, Safari (prior to version 13)
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced (implied by canonical URL and external links)
  • Domain status includes clientDeleteProhibited, clientRenewProhibited, clientTransferProhibited, clientUpdateProhibited

Analytics and tracking

Tracking level
minimal
Privacy practices
excellent

Advertising

Transparency
excellent

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. No explicit privacy, cookie, or terms of service policies found on the main page.
  3. Contact information limited to a single contact email in footer.
  4. Strong open-source community presence with GitHub links and active development.
  5. No tracking or advertising scripts detected, consistent with privacy-focused product.
  6. Good multilingual support with alternate hreflang links for multiple languages.
  7. No forms detected on the main page; minimal data collection.
  8. No social media links explicitly found except GitHub and Reddit references.
  9. Website uses HTTPS and Cloudflare DNS but DNSSEC is not enabled.
  10. No security.txt or vulnerability disclosure page found.
Technical notes

Notes

The website is built using standard web technologies including HTML5, CSS3, JavaScript, and jQuery 3.5.1, with fonts loaded from Google Fonts. It is hosted behind Cloudflare DNS and CDN services, providing performance and security benefits. The site is mobile responsive and optimized for fast loading with proper meta tags and SEO best practices. No CMS or complex frameworks are detected, indicating a lightweight and maintainable codebase. However, the absence of DNSSEC and security headers suggests some technical debt in security hardening. The site does not collect user data via forms or tracking scripts, aligning with its privacy-focused mission. Overall, the technical infrastructure is solid, performant, and well-suited for the project's goals.
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. 75/100Medium3 findings · partial scanView report
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