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Security report for naperville.il.us

City of Naperville · Government · United States

Medium risk. 8 critical or high findings in SSL/TLS, GDPR outside view and 1 other check.

Security score

59/100

Risk levelMedium

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

The City of Naperville website serves as the official digital presence for the municipal government of Naperville, Illinois. It provides residents, businesses, and visitors with comprehensive information about city services, utilities, government meetings, community events, and public safety resources. The site is well-positioned as a trusted source for local government information, emphasizing transparency and community engagement. The business model is focused on public service delivery and civic communication, targeting a broad audience including residents, local businesses, and government stakeholders. Technically, the website employs modern web technologies including Google Analytics, Google Tag Manager, Hotjar for user behavior insights, and Monsido for accessibility and quality assurance. The site is served over HTTPS with strong security headers, indicating a mature digital infrastructure. The design is responsive and accessible, with structured data enhancing SEO and usability. However, the absence of a visible cookie consent mechanism and limited privacy compliance disclosures suggest areas for improvement in regulatory adherence. From a security perspective, the site demonstrates good practices such as HTTPS enforcement, security headers, and no visible vulnerabilities or exposed sensitive data. Nonetheless, the lack of published security policies, incident response contacts, and vulnerability disclosure mechanisms indicates a gap in security transparency and readiness. The missing WHOIS data, likely due to .US registry policies, slightly impacts trust but does not detract significantly given the official nature of the site. Overall, the website is a high-quality, professional municipal portal with strong content and technical foundations. Strategic enhancements in privacy compliance and security transparency would further strengthen its risk posture and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

8 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

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, Twitter, LinkedIn, YouTube, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

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

Keep watching naperville.il.us

This scan found 25 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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  • 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
72
Security headers
20
Email security
60
DNS health
65
Network security
100
GDPR outside view
35
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

Naperville is a large city with a diversified economy including government services, energy utilities, transportation, and retail sectors. The website reflects a mature municipal government entity focused on delivering essential services and fostering community involvement. The city leverages digital tools to engage residents and businesses, providing online bill payment, event information, and government transparency. The presence of multiple social media channels and integration with third-party platforms indicates an active outreach strategy. While revenue streams are typical for a municipal government (taxes, fees, utility payments), the site also supports economic development through business resources and infrastructure projects. Growth indicators include ongoing community projects and a robust calendar of events. Partnerships appear to be local and regional, with no evidence of commercial subsidiaries or parent companies.

Security posture

The website exhibits a solid security posture with HTTPS enforced and multiple security headers implemented. The use of reputable analytics and monitoring tools like Google Analytics and Hotjar is balanced by the absence of explicit cookie consent, which could pose compliance risks. No exposed credentials or vulnerable libraries were detected in the HTML content. However, the lack of a published security policy, incident response contacts, and vulnerability disclosure process limits transparency and may hinder effective incident management. The missing WHOIS data is a minor concern but likely due to registry policies rather than malicious intent. Overall, the site is secure for typical municipal use but would benefit from enhanced privacy and security governance documentation.

Recommendations

  1. Implement a clear and accessible cookie consent banner to comply with privacy regulations such as GDPR and CCPA.
  2. Publish a dedicated security policy and incident response information page to improve transparency and user trust.
  3. Establish and publicize a vulnerability disclosure program or security.txt file to facilitate responsible security reporting.
  4. Regularly review and audit third-party scripts and tracking tools to ensure ongoing security and privacy compliance.
  5. Enhance privacy compliance disclosures, including data retention policies and user rights information.

Contact details published on the site

Addresses
Legal name
City of Naperville
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
City of Naperville
Description
Naperville is a vibrant city located 28 miles west of Chicago with approximately 150,000 residents. It offers acclaimed schools, the best public library system in the country, world-class parks, diverse worship options, an award-winning hospital, and an exceptionally low crime rate. The city has a diversified employer base including high technology firms, retailers, factories, and small businesses. It provides a variety of public transportation, housing, and employment options.
Key services
Utility billing and services, Garbage and recycling, Fire and police departments, Permits and licenses, Community events and notifications, Transportation and parking, Senior and accessibility services
Content quality
excellent
Branding
consistent

Technology

Stack
Google Analytics, Google Tag Manager, Hotjar, Monsido, Typekit Fonts, Ionicons
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected
  • Secure forms with no password fields visible

Analytics and tracking

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

Advertising

Tracking pixels
Hotjar, Monsido
Marketing tools
Hotjar, Monsido
Transparency
basic

Site quality

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

Key observations

  1. Official city government website with comprehensive public service information.
  2. No WHOIS data available, likely due to .US registry policies.
  3. No visible privacy cookie consent mechanism despite tracking scripts present.
  4. Good use of structured data and accessibility features.
  5. Multiple external trusted domains linked for services and social media.
  6. No security policy or incident response information published.
  7. No vulnerability disclosure or security.txt found.
  8. No exposed sensitive data or obvious vulnerabilities detected.
Technical notes

Notes

The website is built using modern web technologies including asynchronous loading of analytics and tracking scripts, Typekit fonts for typography, and Ionicons for iconography. It uses Google Tag Manager for flexible tag management and Hotjar for user behavior analytics. The site is well-structured with semantic HTML and ARIA attributes supporting accessibility. Performance is moderate with some large images but overall good responsiveness and mobile optimization. The hosting provider is not explicitly identified but likely managed by the .US registry or a government hosting service. There is no detected CMS, suggesting a custom or proprietary platform. The site uses structured data (JSON-LD) for enhanced SEO and rich snippets. Technical risks are low, but the absence of cookie consent and security policy pages are notable gaps.
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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