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Security report for 33across.co.uk

33Across UK · Technology · United Kingdom

Medium risk. 6 critical or high findings in Email security, Security headers and 2 other checks.

Security score

65/100

Risk levelMedium

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

33Across UK operates as a technology company specializing in programmatic advertising solutions, supply-side curation, addressable technology, and data-driven marketing services. The company targets advertisers, marketers, and publishers seeking to optimize digital campaign outcomes through advanced programmatic targeting. Positioned as a leading provider in its niche, 33Across UK leverages modern web technologies and SEO best practices to maintain a professional online presence. The website is built on WordPress with Elementor and Yoast SEO, indicating a mature digital infrastructure. Security posture is solid with HTTPS enabled and cookie consent mechanisms in place, though additional security headers could enhance protection. Privacy compliance is well addressed with comprehensive policies and GDPR adherence. Overall, the business demonstrates a credible and professional digital footprint with room for security enhancements and clearer public contact information.

Scanned

This is an earlier scan of 33across.co.uk. View the latest report

NIS2 and GDPR posture

GDPR outside view
80/ 100 · Low
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. 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 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';…

  3. 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

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

Keep watching 33across.co.uk

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.

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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
62
Security headers
30
Email security
60
DNS health
60
Network security
100
GDPR outside view
80
Average
65

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

33Across UK is positioned in the technology and media sectors, focusing on programmatic advertising technology. Its business model revolves around providing data and addressable technology solutions to improve advertising campaign effectiveness. The company likely generates revenue through technology licensing, data services, and partnerships with advertisers and publishers. The website's content and structured data reflect a medium-sized enterprise with consistent branding and a clear value proposition. The presence of HubSpot marketing tools suggests active lead generation and customer engagement strategies. The lack of explicit contact emails or phone numbers on the site may indicate a preference for controlled lead capture via forms. No parent or subsidiary companies are identified, and no certifications or security frameworks are publicly disclosed.

Security posture

The website employs HTTPS, ensuring encrypted communications, and implements a cookie consent banner aligned with GDPR requirements. However, the absence of several key security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options represents an area for improvement. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The site lacks a public security policy, incident response contact, or vulnerability disclosure page, which are important for transparency and trust. The WHOIS data query was unsuccessful due to querying an invalid subdomain, but the domain itself appears legitimate. Overall, the security posture is moderate, with good foundational practices but missing advanced protections and transparency elements.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, and Referrer-Policy to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and trust with users and partners.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Enhance contact information visibility by providing verified company emails and phone numbers to facilitate communication and support.
  5. Regularly audit and update all plugins and CMS components to mitigate risks from known vulnerabilities and maintain compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
33Across UK
Description
Simplify programmatic targeting and drive better campaign outcomes with 33Across. Offering leading supply-side curation, addressable technology, and data solutions.
Key services
Programmatic targeting, Supply-side curation, Addressable technology, Data solutions
Content quality
good
Branding
consistent

Technology

Stack
WordPress 6.8.1, Yoast SEO plugin, Elementor page builder, Bootstrap CSS, jQuery, HubSpot scripts, Cookie Law Info plugin, Dynamic Charts plugin, Odometer.js
Frameworks
Bootstrap
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • Cookie consent banner implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
HubSpot
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. WHOIS data query was performed on 'www.33across.co.uk' which is invalid; domain likely registered as '33across.co.uk'.
  3. Site uses modern WordPress CMS with popular plugins and SEO optimizations.
  4. Privacy and cookie policies are present and GDPR compliant.
  5. No explicit contact emails or phone numbers found in the HTML; contact form is available.
  6. No security.txt or vulnerability disclosure page detected.
  7. No explicit security or incident response policies found.
  8. Site branding and content are consistent and professional.
Technical notes

Notes

The website is built on WordPress 6.8.1 using Elementor for page building and Yoast SEO for search optimization. It incorporates Bootstrap CSS for responsive design and jQuery for client-side scripting. HubSpot scripts indicate integration with marketing automation tools. Cookie Law Info plugin manages cookie consent, reflecting GDPR compliance. The site loads external resources from trusted domains such as fonts.googleapis.com and github.hubspot.com. Performance is moderate with good mobile optimization and basic accessibility features. The technical stack is modern and well-maintained, though opportunities exist to improve security headers and accessibility compliance to reduce technical debt and enhance user experience.
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. 53/100Medium30 findingsView report
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