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Security report for gumgum.com

GumGum · Technology · United States

Low risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

81/100

Risk levelLow

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

GumGum is an established enterprise-level advertising technology company founded in 2004, specializing in AI-powered contextual intelligence and high-impact advertising solutions across display, video, and connected TV formats. The company positions itself as a leader in brand-safe advertising with a strong focus on delivering relevant and personalized ad experiences. Their platform integrates advanced AI to analyze audience mindset and attention metrics, serving a diverse clientele including major global brands and agencies. Technically, the website is built on Webflow CMS, hosted on AWS infrastructure, and employs modern web technologies such as Google Tag Manager, Google Analytics, and OneTrust for cookie consent management. The site is well-optimized for performance, mobile responsiveness, and SEO, with multilingual support via Weglot. Security-wise, the site enforces HTTPS and uses cookie consent mechanisms but lacks explicit security headers and published security policies. No critical vulnerabilities or exposed sensitive data were detected. Overall, GumGum demonstrates a mature digital presence with strong business credibility and good security posture, though improvements in privacy policy transparency and security header implementation are recommended.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

2 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

  2. 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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching gumgum.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

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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
82
Security headers
55
Email security
80
DNS health
85
Network security
100
GDPR outside view
83
Average
81

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

GumGum operates in the competitive ad tech sector, leveraging AI and contextual data to differentiate its offerings. Its business model revolves around providing advertisers and publishers with tools to maximize ad relevance and performance while ensuring brand safety. The company maintains a robust partnership ecosystem with major brands and DSPs, enhancing its market reach. GumGum's focus on innovation, scale, and trusted results is evident from its client portfolio and case studies. The absence of direct contact emails and phone numbers on the site suggests a controlled communication channel via contact forms, typical for enterprise businesses. The use of OneTrust and GDPR-compliant cookie consent indicates awareness of privacy regulations, though the lack of a visible privacy policy is a gap. The company’s longevity and domain age support its credibility and market stability.

Security posture

The website exhibits a solid security foundation with HTTPS enforced and cookie consent managed by OneTrust, supporting GDPR compliance. However, the absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces the overall security posture. No signs of exposed sensitive information or vulnerable libraries were found. The lack of a published security policy or incident response contact channels limits transparency in security governance. No vulnerability disclosure or security.txt file is present, which could be improved to foster trust and responsible vulnerability reporting. Overall, the security posture is good but could be enhanced by implementing recommended headers and publishing security documentation.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service accessible from the website footer or main navigation.
  2. Implement and configure security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen protection against common web attacks.
  3. Create and publish a security policy and incident response contact information to improve transparency and readiness.
  4. Add a vulnerability disclosure policy or security.txt file to encourage responsible security reporting.
  5. Enhance accessibility features to meet or exceed compliance standards and improve user experience for all visitors.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
GumGum
Description
Deliver high-impact, brand-safe advertising across display, video, and CTV/OTT formats with AI-powered contextual targeting and attention-based insights—powered by GumGum’s leading ad tech platform.
Key services
Contextual Intelligence Platform, Attention Metrics, Creative Advertising Solutions, Connected TV Advertising, Video Advertising, Ad Exchange
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, Google Tag Manager, Google Analytics, OneTrust Cookie Consent, Weglot (translation/localization), jQuery, WebFont Loader, AWS DNS
Frameworks
Webflow
Platforms
Webflow Hosting
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of OneTrust for GDPR cookie consent
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected in scripts

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
GumGum Exchange
Marketing tools
OneTrust Cookie Consent, Weglot Translation
Transparency
good

Site quality

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

Key observations

  1. Website uses modern web technologies and is well-structured.
  2. Strong branding and consistent messaging throughout the site.
  3. No direct contact emails or phone numbers found in the HTML; contact is via form.
  4. Cookie consent is managed by OneTrust, indicating GDPR awareness.
  5. No explicit privacy policy or terms of service links found in the provided HTML snippet.
  6. No security.txt or vulnerability disclosure found.
  7. No exposed sensitive data or security vulnerabilities detected in scripts.
  8. Multiple major brand logos displayed as clients, enhancing trust.
  9. Website is multilingual using Weglot translation service.
  10. Google Analytics and Google Tag Manager are used for analytics and marketing.
Technical notes

Notes

The website is built on a modern and scalable infrastructure using Webflow CMS and AWS hosting, ensuring good performance and reliability. Integration of Google Tag Manager and Google Analytics supports robust analytics and marketing capabilities. The use of OneTrust for cookie consent demonstrates compliance with privacy regulations. Multilingual support via Weglot expands the global reach. The site is well-optimized for mobile devices and SEO, with clean and valid HTML/CSS. No technical debt or deprecated libraries were detected. Opportunities exist to improve security headers and publish additional compliance documentation to further enhance the technical maturity and trustworthiness of the platform.
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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