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Security report for omnicomgroup.com

OmnicomGroup · Media · N/a

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

Security score

81/100

Risk levelLow

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

Omnicom Group is a global leader in marketing communications, providing brand and advertising services to over 5,000 clients across more than 70 countries. The company operates through a network of iconic agency brands focused on delivering data-inspired, creative marketing and sales solutions. The website reflects a mature digital presence with professional design, clear navigation, and comprehensive content targeting business clients worldwide. Technically, the site is built on WordPress with modern SEO and analytics tools integrated, including Yoast SEO, Google Analytics, and OneTrust for cookie consent management. Security posture is solid with HTTPS enforced and privacy compliance mechanisms in place, though explicit security headers and incident response contacts are not evident. The absence of WHOIS registration data is a minor concern but does not detract significantly from the site's legitimacy given the corporate branding and investor relations presence. Overall, the site demonstrates a strong commitment to privacy, user experience, and corporate transparency.

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. 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
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching omnicomgroup.com

This scan found 16 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
47
Security headers
80
Email security
97
DNS health
80
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

Omnicom Group holds a strong market position as a leading global marketing communications provider. Its business model centers on delivering creative and data-driven advertising services through a portfolio of agency brands. The company targets large enterprises and global clients seeking comprehensive marketing solutions. Investor relations content and recent news updates indicate active corporate governance and growth initiatives. The website's integration with social media platforms and investor portals suggests a well-established partnership ecosystem and a focus on stakeholder engagement. The lack of direct contact information on the homepage may indicate a preference for controlled communication channels, typical for large enterprises. The company operates in the media sector with an enterprise-sized footprint.

Security posture

The website employs HTTPS with a valid SSL certificate, ensuring encrypted communications. Cookie consent is managed via OneTrust, indicating compliance with GDPR and related privacy regulations. However, the absence of visible security headers such as Content Security Policy (CSP), X-Frame-Options, or Strict-Transport-Security (HSTS) suggests room for improvement in hardening the site against common web attacks. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The site lacks explicit security policy documentation and incident response contact details, which are recommended for enhanced transparency and preparedness. Overall, the security posture is good but could benefit from additional security controls and disclosures.

Recommendations

  1. Implement and enforce security headers including CSP, HSTS, and X-Frame-Options to enhance protection against web-based attacks.
  2. Publish a dedicated security policy and provide clear incident response contact information to improve transparency and trust.
  3. Regularly audit and update third-party scripts and plugins to mitigate potential vulnerabilities.
  4. Enhance visibility of data protection officer contact details and certifications to strengthen compliance posture.
  5. Maintain and monitor domain registration status to avoid trust issues related to missing WHOIS data.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
OmnicomGroup
Description
A global leader in marketing communications, Omnicom provides brand and advertising services to over 5,000 clients in over 100 countries.
Key services
Brand services, Advertising services, Creative marketing, Sales solutions
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Yoast SEO plugin, jQuery, Google Analytics, Google Tag Manager, OneTrust Cookie Consent
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

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

Analytics and tracking

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

Advertising

Marketing tools
AddToAny sharing, OneTrust Cookie Consent
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 professional design.
  2. Strong compliance with privacy and cookie regulations via OneTrust.
  3. No direct contact emails or phone numbers found on homepage content.
  4. Social media presence is active and linked to official company profiles.
  5. No explicit security policy or incident response contact found on main site.
  6. WHOIS data unavailable, which is a minor trust concern.
  7. Use of modern web technologies and SEO best practices evident.
Technical notes

Notes

The website is built on the WordPress CMS platform, utilizing the Yoast SEO plugin for search engine optimization and OneTrust for cookie consent management. It incorporates jQuery and Google Analytics for interactivity and user behavior tracking. The site demonstrates good mobile responsiveness and accessibility features, with a clean and modern design. Performance is moderate, with some reliance on external scripts and fonts. The technical infrastructure supports a professional corporate presence but could be optimized further for speed and security by reducing third-party dependencies and implementing advanced security headers.
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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