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Security report for casan.com.br

Companhia Catarinense de Águas e Saneamento · Energy · Brazil

Medium risk. 9 critical or high findings in GDPR outside view, SSL/TLS and 2 other checks.

Security score

50/100

Risk levelMedium

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

CASAN (Companhia Catarinense de Águas e Saneamento) is a large regional public utility company in Brazil specializing in water supply and sanitation services primarily for the state of Santa Catarina. The company provides a broad range of services including water distribution, sewage treatment, billing, debt management, and social tariff programs. The website serves as a customer portal offering quick access to payment options, service notifications, and customer support channels. CASAN maintains an active social media presence and links to government transparency and regulatory portals, reinforcing its public utility status. Technically, the website uses legacy JavaScript libraries such as jQuery 1.7.1 and jCarousel, indicating some technical debt. The site is moderately optimized for mobile devices and has a clear navigation structure. Hosting appears to be managed internally or via dedicated infrastructure. Google Analytics is used for visitor tracking, but no privacy or cookie policies are present, which is a compliance gap. Security headers are not visible in the HTML source, and the use of outdated libraries may expose the site to vulnerabilities. From a security perspective, the site benefits from HTTPS usage on external service links and no visible sensitive data exposure. However, the lack of modern security headers, outdated JavaScript libraries, and missing privacy compliance elements reduce the overall security posture. Incident response and security policy information are not publicly available. The domain registration data aligns well with the business claims, indicating legitimacy and trustworthiness. Overall, CASAN's website is a functional and professional portal for a major public utility company but would benefit from modernization of its technical stack, enhanced security practices, and improved privacy compliance to reduce risk and improve user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 100 · Critical
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

9 findings rated critical or high. Fix these first.

  1. GDPR outside view

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

    • Critical

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

    • 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

  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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

  3. 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';…

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

Keep watching casan.com.br

This scan found 20 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

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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
0
Security headers
30
Email security
90
DNS health
70
Network security
100
GDPR outside view
10
Average
50

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

CASAN holds a strong market position as the primary water and sanitation service provider in Santa Catarina, Brazil. Its business model is that of a public utility, focusing on essential services to municipalities and residents. Revenue streams likely include water and sewage billing, social tariff subsidies, and government contracts. The company leverages partnerships with payment processors and regulatory agencies, as evidenced by linked domains. Growth indicators include infrastructure expansion projects and active communication channels. The company targets residential customers, municipalities, and commercial clients within its service area. Strategic observations include the need to modernize digital infrastructure and enhance compliance to maintain competitive advantage and regulatory alignment.

Security posture

The current security maturity level is moderate but with notable gaps. The use of outdated JavaScript libraries such as jQuery 1.7.1 introduces potential vulnerabilities. The absence of visible security headers like Content-Security-Policy and Strict-Transport-Security reduces defense-in-depth. No public security policy or incident response contacts are provided, limiting transparency and readiness perception. GDPR and cookie consent compliance are lacking, which may pose regulatory risks. The site uses HTTPS for external services but the main domain's SSL configuration is unknown. Overall, the security culture appears basic with room for improvement in modern security best practices and compliance.

Recommendations

  1. Update all JavaScript libraries to current secure versions to mitigate known vulnerabilities.
  2. Publish a comprehensive privacy policy and implement a cookie consent mechanism to improve GDPR compliance.
  3. Add and configure security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Establish and publicize a security policy and incident response contact channels to enhance transparency and readiness.
  5. Conduct a security audit of third-party integrations and improve accessibility features for broader compliance.

Contact details published on the site

Addresses
Legal name
Companhia Catarinense de Águas e Saneamento
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Companhia Catarinense de Águas e Saneamento
Description
CASAN is a Brazilian company providing water supply and sanitation services primarily in the state of Santa Catarina. It offers services such as water supply, sewage collection and treatment, billing, debt negotiation, and social tariffs.
Key services
Water supply, Sewage collection and treatment, Billing and payment services, Debt negotiation and installment plans, Social tariff programs
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.7.1, jCarousel, JavaScript, CSS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • HTTPS usage implied by external links (https://) for payment and service portals
  • No visible exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Google Analytics (gtag.js)
Transparency
basic

Site quality

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

Key observations

  1. Website is a public utility portal for CASAN, a water and sanitation company in Santa Catarina, Brazil.
  2. No privacy or cookie policy found, which is a compliance gap.
  3. Multiple contact methods including phone, WhatsApp, chat, and contact forms are provided.
  4. Use of outdated JavaScript libraries may pose security risks.
  5. No visible security headers in HTML source; SSL status unknown but external links use HTTPS.
  6. Social media presence is active with official accounts linked.
  7. Website content is rich and relevant to the business and customers.
  8. No signs of WAF or blocking mechanisms detected.
Technical notes

Notes

The website uses legacy front-end technologies including jQuery 1.7.1 and jCarousel, indicating technical debt and potential security risks. The CSS and JavaScript are custom and versioned, suggesting some maintenance effort. Hosting appears to be managed internally or via a dedicated provider (traefik.casan.com.br). Performance is moderate with basic mobile optimization and SEO meta tags present. Accessibility features are minimal. The site lacks modern frameworks or CMS indications, which may limit scalability and ease of updates. There is opportunity to modernize the tech stack, improve performance, and enhance security configurations to reduce operational 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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