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Security report for constellationenergy.com

Constellation · Energy · United States

Medium risk. 5 critical or high findings in Email security, Security headers and 1 other check.

Security score

69/100

Risk levelMedium

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

Constellation is a leading energy company positioned as the nation’s largest producer of carbon-free energy, providing sustainable energy solutions to residential, commercial, and public-sector customers. The company emphasizes sustainability and innovation, offering a range of services including generation, wholesale energy, and retail products. Founded in 2022, Constellation presents itself as an enterprise-level organization with a strong focus on environmental stewardship and community impact. Technically, the website is built on Adobe Experience Manager, leveraging modern JavaScript libraries and tracking tools such as Google Tag Manager and Adobe Helix RUM. The site is well-structured, mobile-optimized, and includes comprehensive metadata and structured data for SEO and accessibility. Privacy compliance is robust, featuring a cookie consent mechanism and detailed privacy policies. From a security perspective, the site enforces HTTPS and employs cookie consent best practices. However, explicit security headers are not visible in the HTML source, and there is no publicly available incident response or vulnerability disclosure information. The absence of WHOIS data for the domain is a notable concern, potentially indicating privacy protection or registration issues, which slightly reduces the overall trust score. Overall, the website demonstrates a high level of professionalism, content quality, and privacy compliance, with moderate technical and security maturity. Strategic improvements in security transparency and domain registration verification are recommended to enhance trust and resilience.

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

5 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

    • High

      No SPF record found

      SPF helps prevent email spoofing

      What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"

  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 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. 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 constellationenergy.com

This scan found 22 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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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
77
Security headers
40
Email security
40
DNS health
70
Network security
100
GDPR outside view
88
Average
69

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

Constellation operates in the energy sector with a focus on carbon-free and sustainable energy solutions. Its market position as the largest producer of carbon-free energy in the nation suggests significant competitive advantage and scale. The business model includes energy generation, wholesale energy sales, and retail energy products, targeting a broad audience including homes, businesses, and public entities. The company’s digital presence reflects a mature enterprise with investments in compliance, branding, and customer engagement. Partnerships and social media presence indicate active marketing and community involvement. Growth indicators include recent founding date and comprehensive sustainability initiatives. No direct parent or subsidiary companies were identified from the website content.

Security posture

The website exhibits a solid security posture with mandatory HTTPS and cookie consent mechanisms in place, reflecting compliance with privacy regulations such as GDPR. The use of reputable analytics and consent management tools further supports privacy and security best practices. However, the lack of visible security headers (e.g., Content Security Policy, HSTS) and absence of incident response or vulnerability disclosure pages indicate areas for improvement. The missing WHOIS data for the domain raises questions about domain registration transparency, which could impact trust. No vulnerabilities or exposed sensitive data were detected in the HTML content. Overall, the security maturity is moderate with room for enhanced transparency and technical controls.

Recommendations

  1. Implement and publish explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options to strengthen browser security.
  2. Publish an incident response page or contact channel to improve transparency and readiness for security incidents.
  3. Consider establishing a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Verify and update WHOIS domain registration information to improve domain trustworthiness and reduce suspicion.
  5. Continue to maintain and enhance privacy compliance mechanisms, including clear data retention policies and user rights information.

Contact details published on the site

Addresses
Legal name
Constellation
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Constellation
Description
Constellation is nation’s largest producer of carbon-free energy and provides sustainable solutions to homes, businesses, and public-sector customers.
Key services
Carbon-free energy production, Sustainable energy solutions, Wholesale energy, Retail products and services
Content quality
excellent
Branding
consistent

Technology

Stack
Adobe Helix RUM, Google Tag Manager, OneTrust Cookie Consent, Bootstrap (implied by navbar classes), JavaScript
Frameworks
Adobe Experience Manager (AEM)
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
  • No vulnerable libraries detected

Analytics and tracking

Services
Google Tag Manager, Adobe Helix RUM
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Adobe Helix RUM
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 navigation
  2. Strong corporate branding and consistent design
  3. Comprehensive privacy and cookie policies with consent mechanism
  4. No WHOIS data available, which is unusual for a corporate domain
  5. No visible security headers in HTML source; may be set at server level
  6. Use of modern tracking and analytics tools
  7. No signs of adult or questionable content
  8. No visible incident response or vulnerability disclosure pages
Technical notes

Notes

The website is built on Adobe Experience Manager, a robust enterprise CMS platform, indicating a mature digital infrastructure. It uses modern JavaScript libraries and integrates Google Tag Manager and Adobe Helix RUM for analytics and performance monitoring. The site is mobile-optimized and accessible, with comprehensive metadata and structured data enhancing SEO and user experience. Performance is moderate, with potential for optimization. No deprecated or vulnerable libraries were detected. The site employs a cookie consent banner powered by OneTrust, demonstrating compliance with privacy regulations. Technical debt appears low, but improvements in security header implementation and domain registration transparency are advised to mitigate 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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