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Security report for exxonmobil.co.uk

ExxonMobil · Energy · United Kingdom

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

ExxonMobil is a leading global energy company with a significant presence in the United Kingdom, particularly in the offshore oil and gas sector. The website highlights its joint operations in the North Sea and emphasizes its commitment to sustainability and community investment. The digital infrastructure is modern, leveraging advanced web technologies and compliance tools such as OneTrust for cookie consent and Google Tag Manager for analytics. The site is well-structured, mobile-optimized, and professionally designed, reflecting the company's enterprise-level stature. Security posture is strong with HTTPS enforcement and standard security headers, although explicit security policies and incident response details are not prominently published. Overall, the website represents a mature digital presence consistent with a major multinational corporation.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 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 exxonmobil.co.uk

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.

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
52
Security headers
75
Email security
85
DNS health
85
Network security
100
GDPR outside view
88
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

ExxonMobil operates in the energy and transportation sectors, focusing on oil and gas exploration, production, and industrial solutions. The company targets industry professionals, investors, and the general public with comprehensive content and resources. Its market position is that of a top-tier global energy provider with extensive operations in the UK and worldwide. The business model integrates upstream and downstream activities, supported by a broad brand portfolio including Mobil and Esso. The website ecosystem includes multiple related domains for investors, chemicals, and regional operations, indicating a complex and well-managed corporate structure. Growth indicators include sustainability initiatives and community engagement programs.

Security posture

The website demonstrates a solid security foundation with HTTPS, security headers, and no visible vulnerabilities or exposed sensitive data. The use of OneTrust indicates attention to privacy compliance, particularly GDPR. However, the absence of a published security policy, incident response information, or vulnerability disclosure program suggests room for improvement in transparency and security maturity. No security.txt file was detected, and no direct security contact channels were found. The overall security posture is good but could be enhanced by publishing more explicit security governance documentation.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear contact information for the Data Protection Officer or security team.
  4. Regularly audit and update third-party scripts to ensure no vulnerabilities.
  5. Enhance user trust by showcasing certifications and compliance badges more prominently.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ExxonMobil
Description
We are one of the largest investors in the UK offshore industry. Investment in the North Sea is managed through a 50/50 joint operation with Shell.
Key services
Oil and gas exploration and production, Energy supply, Industrial solutions, Materials for modern living
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, OneTrust Cookie Consent, Custom fonts, CSS3, HTML5
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

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

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
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 no blocking or WAF challenge.
  2. Content is professionally presented and relevant to the energy sector.
  3. Strong privacy and cookie compliance with OneTrust integration.
  4. No direct contact emails or phone numbers found on this page; likely centralized on main corporate contact pages.
  5. No security.txt or explicit vulnerability disclosure found.
  6. WHOIS data for subdomain not available, typical for large corporate subdomains.
  7. Use of Google Tag Manager and OneTrust indicates mature marketing and compliance practices.
Technical notes

Notes

The website uses a modern tech stack including HTML5, CSS3, JavaScript, and integrates third-party services such as Google Tag Manager and OneTrust for analytics and compliance. Hosting appears to be via Akamai CDN, supporting fast load times and global availability. The site is mobile-optimized with responsive design and accessibility features. SEO is well addressed with proper meta tags and Open Graph data. No CMS was explicitly detected, suggesting a custom or proprietary platform. Performance is fast with preloading of fonts and scripts. Technical risks are minimal, but continuous monitoring of third-party dependencies is recommended to mitigate supply chain risks.
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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