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Security report for a1.si

A1 Slovenija · Telecommunications · Slovenia

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

69/100

Risk levelMedium

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

A1 Slovenija is a leading private telecommunications provider in Slovenia, offering a wide range of communication services including mobile subscriptions, prepaid packages, triple play bundles, and devices. The company serves over 700,000 users with a strong market presence and a workforce of more than 500 employees. Their website reflects a mature digital infrastructure with modern technologies such as Liferay CMS, Vue.js, and various accessibility and analytics tools. The site is well-optimized for SEO, mobile-friendly, and compliant with GDPR regulations, including a comprehensive cookie consent mechanism. Security posture is solid with HTTPS enforced and no visible vulnerabilities, although explicit security policies and incident response information are not publicly disclosed. Overall, the domain registration and business information align well, indicating a trustworthy and legitimate enterprise.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

6 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

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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

      Third-party services without privacy policy

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

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

  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';…

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Keep watching a1.si

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.

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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
67
Security headers
50
Email security
85
DNS health
70
Network security
100
GDPR outside view
40
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

The company holds a strong market position as Slovenia's leading private telecom operator, targeting both consumer and business segments. Their business model revolves around providing integrated communication solutions, including mobile, internet, TV, and fixed telephony services. The website's content and structured data demonstrate a focus on transparency and customer engagement, supported by active social media channels. The absence of privacy protection in WHOIS data and the domain's long age reinforce the company's established presence. The use of advanced web technologies and compliance with privacy laws suggest a forward-looking digital strategy.

Security posture

The website employs HTTPS with an excellent SSL configuration and uses security best practices such as cookie consent and asynchronous loading of analytics and accessibility scripts. However, there is no explicit security policy or incident response contact information visible, which could be improved to enhance transparency and readiness. No vulnerabilities or exposed sensitive data were detected in the HTML content. The security score is high but could be further improved by publishing security policies and vulnerability disclosure mechanisms.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and controls.
  2. Provide clear incident response contact channels such as security@ or abuse@ email addresses.
  3. Implement and publish a vulnerability disclosure policy or security.txt file.
  4. Ensure all recommended security headers (X-Frame-Options, X-Content-Type-Options) are present and documented.
  5. Regularly audit third-party scripts and dependencies for vulnerabilities and update accordingly.

Contact details published on the site

Addresses
Legal name
A1 Slovenija, telekomunikacijske storitve, d. d.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
A1 Slovenija
Description
A1 Slovenija is the leading private provider of comprehensive communication services in Slovenia. More than 500 employees are committed to creating solutions that enrich the lives of over 700,000 users in the digital age.
Key services
Mobile subscription packages, Prepaid packages, Triple play bundles (internet, TV, fixed telephony), Mobile phones and devices, International calls
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Vue.js (inferred from template syntax), RequireJS, Liferay Portal, Google Fonts, UserWay accessibility widget, Luigi's Box autocomplete and search, Cookielaw.org consent management
Frameworks
Liferay, Vue.js
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner
  • No exposed sensitive data in HTML
  • Use of security and analytics scripts asynchronously

Analytics and tracking

Services
Google Tag Manager, UserWay analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Google Tag Manager (via sst.a1.si), UserWay accessibility analytics
Marketing tools
Luigi's Box autocomplete and search, UserWay accessibility widget
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional corporate site for a leading Slovenian telecommunications provider.
  2. Content is in Slovenian language with localized metadata and structured data.
  3. Strong compliance with GDPR and cookie consent requirements.
  4. Use of modern web technologies and accessibility tools.
  5. No signs of security blocking or WAF challenges.
  6. No explicit security policy or incident response information publicly available.
  7. WHOIS data supports legitimacy and long-term operation.
Technical notes

Notes

The website is built on the Liferay CMS platform with Vue.js components, RequireJS for module loading, and integrates several third-party services for accessibility (UserWay), search (Luigi's Box), and cookie consent (cookielaw.org). The site uses Google Fonts and is optimized for mobile devices with responsive design. Performance is moderate, with asynchronous script loading and modern JavaScript frameworks. The technical stack is modern and well-maintained, though some opportunities exist to improve performance and security header implementation. The site structure and metadata are well-formed, supporting SEO and accessibility.
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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