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Security report for pubtm.com

Transfon Ltd · Technology · N/a

Medium risk. 5 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

59/100

Risk levelMedium

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

BiddingStack, operated by Transfon Ltd, is a specialized technology platform offering a managed programmatic header bidding stack for publishers. The platform integrates multiple header bidding technologies including Prebid.js, Amazon UAM, and Google Open Bidding to optimize ad revenue for digital publishers. Positioned as a commission-free alternative to other ad management platforms, BiddingStack targets publishers seeking to simplify and maximize their programmatic advertising efforts. The company was founded in 2017 and maintains a consistent and professional web presence with comprehensive service offerings and real-time reporting capabilities. Technically, the website is built on modern web technologies including Next.js and integrates various third-party services such as Google Tag Manager, UniConsent CMP for privacy compliance, and WAF360 for security. The site demonstrates excellent performance, mobile optimization, and SEO practices. However, the absence of explicit security policy pages and incident response contacts indicates room for improvement in transparency and security communication. From a security perspective, the site enforces HTTPS and employs cookie consent mechanisms, but lacks published security policies or vulnerability disclosure information. The WHOIS data for the domain is missing, which raises concerns about domain registration legitimacy and reduces overall trustworthiness. Despite this, the business information and website content appear professional and trustworthy, with no signs of malicious or adult content. Overall, BiddingStack presents a strong business and technical profile with minor gaps in security transparency and domain registration clarity. Strategic improvements in these areas would enhance trust and compliance posture, supporting the company’s growth and market credibility.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 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. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  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 pubtm.com

This scan found 17 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

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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
0
Security headers
30
Email security
70
DNS health
85
Network security
100
GDPR outside view
68
Average
59

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

BiddingStack operates in the competitive programmatic advertising technology sector, focusing on header bidding solutions for publishers. Its competitive advantage lies in offering a unified stack integrating multiple bidding technologies and a commission-free ad management model. The business model is SaaS-based, targeting digital publishers and advertisers who require efficient ad monetization tools. Revenue streams likely include subscription fees or service charges for managed ad stack solutions. The company maintains a partnership ecosystem with related platforms such as Ampbid, PubPerf, UniSignIn, and UniConsent, enhancing its service portfolio. Growth indicators include continuous feature updates and a comprehensive blog with industry insights. The company’s operations are centralized under Transfon Ltd, with a clear branding strategy and consistent digital presence.

Security posture

The security maturity of BiddingStack is moderate. The website enforces HTTPS and uses a consent management platform to comply with privacy regulations. However, the absence of a dedicated security policy, incident response contacts, and vulnerability disclosure mechanisms indicates gaps in security governance and transparency. No critical vulnerabilities or exposed sensitive data were detected in the website content. The use of third-party security services like WAF360 suggests some level of protection against web attacks. Compliance with GDPR is supported by the privacy and cookie policies. Overall, the security posture is adequate for a small technology company but would benefit from enhanced documentation and incident readiness.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and compliance.
  2. Provide clear incident response contact information to improve transparency and trust.
  3. Implement and publish a vulnerability disclosure or security.txt file to encourage responsible reporting.
  4. Regularly review and update WHOIS domain registration to ensure transparency and legitimacy.
  5. Enhance business credibility by obtaining and displaying relevant security certifications.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Transfon Ltd
Description
BiddingStack is a full ad management platform for header bidding that simplifies programmatic ad-stack and brings header bidding in-house with Prebid.js, Amazon TAM, Google Open Bidding, and Google Adx in one stack. It supports multi-format ads and allows direct competition between banner, native, and video bids.
Key services
Header bidding stack integration, Managed server-side Prebid, Ad management, Real-time reporting and insights, Demand marketplace, Consulting and AdOps
Content quality
excellent
Branding
consistent

Technology

Stack
React (Next.js), Prebid.js, Amazon UAM, Google Open Bidding, Google Tag Manager, UniConsent CMP, WAF360, PubPerf, Ampbid
Frameworks
Next.js, Headless UI
Platforms
Cloud-based hosting (implied), Google Analytics
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, PubPerf
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Amazon UAM, Google Adx, Prebid.js
Tracking pixels
PubPerf
Marketing tools
UniConsent CMP
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. WHOIS data is missing or domain not registered, which is unusual and lowers trust.
  3. Strong privacy and cookie policies with consent mechanism implemented.
  4. No explicit security policy or incident response contacts published.
  5. Modern technology stack with good performance and mobile optimization.
  6. Clear business focus on programmatic header bidding and ad management.
  7. Contact email provided but no phone number or physical address found.
  8. Social media presence on Facebook and Twitter linked.
  9. No adult or questionable content detected; content is safe for general audience.
Technical notes

Notes

The website is built using modern web technologies including Next.js and React, ensuring fast loading times and excellent mobile responsiveness. Integration with Google Tag Manager and UniConsent CMP demonstrates a mature approach to analytics and privacy compliance. The platform supports multiple header bidding technologies, indicating a complex backend infrastructure optimized for programmatic advertising. Performance is fast with good SEO and accessibility features. No CMS was detected, suggesting a custom-built solution. Hosting provider details are not explicit but cloud-based infrastructure is implied. Technical risks are minimal but depend on maintaining up-to-date third-party libraries and ensuring domain registration transparency.
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

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