Skip to main content

Security report for thrifty.nl

The Hertz Corporation · Transportation · Netherlands

Medium risk. 3 critical or high findings in Security headers and SSL/TLS.

Security score

72/100

Risk levelMedium

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

Thrifty.nl is the Dutch localized website of Thrifty Car Rental, a well-established car rental brand operating under The Hertz Corporation. The company offers affordable and flexible car rental services across the Netherlands and Europe, targeting cost-conscious travelers and business clients. The website provides a comprehensive booking platform, detailed fleet information, and localized content in Dutch, supported by a strong brand presence and social media engagement. Technically, the site uses modern web technologies including Bootstrap, jQuery, and Google Tag Manager, with good mobile optimization and SEO practices. Security posture is solid with HTTPS, cookie consent mechanisms, and CSRF protections, though some security headers could be improved. Privacy compliance is robust with clear privacy and cookie policies, and incident response information is publicly available. Overall, the site reflects a mature digital presence aligned with a large transportation company.

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

3 findings rated critical or high. Fix these first.

  1. 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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

  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.

    • 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 thrifty.nl

This scan found 21 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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
35
Email security
70
DNS health
70
Network security
100
GDPR outside view
88
Average
72

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

Thrifty.nl operates as a key player in the European car rental market, leveraging its parent company Hertz's global infrastructure. The business model focuses on affordable vehicle rentals with a wide geographic footprint of over 400 locations. The company targets both leisure and business travelers, offering a diverse fleet including electric vehicles. The website supports multiple languages and regional domains, indicating a broad market reach. Partnerships and subsidiaries like Dollar Car Rental enhance market coverage. The presence of promotional campaigns and flexible booking options suggest active customer engagement and competitive positioning.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, cookie consent compliance, and CSRF tokens in forms. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not evident and could be added to strengthen defenses. The presence of a public Notice of Data Incident indicates transparency in incident response. No vulnerability disclosure or security.txt files were found, which could be improved to encourage responsible reporting. Overall, the site balances usability with security but has room for enhancement in header policies and formal security disclosures.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options.
  2. Publish a dedicated security policy and vulnerability disclosure page, including a security.txt file.
  3. Conduct regular third-party script audits to mitigate supply chain risks.
  4. Enhance accessibility features to meet WCAG standards more fully.
  5. Maintain and update cookie consent mechanisms to reflect evolving privacy regulations.

Contact details published on the site

Addresses
Legal name
The Hertz Corporation
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
The Hertz Corporation
Description
Geniet meer van elke trip in Nederland met onze autoverhuurdiensten. We garanderen dat uw reis onvergetelijk en comfortabel blijft.
Key services
Car rental, Online check-in, Flexible rental options, Electric vehicle rentals
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap 5.3.0-alpha3, jQuery 2.1.4, Slick Carousel 1.8.1, jQuery UI 1.13.2, jQuery Validate 1.19.3, Google Tag Manager, Securiti.ai cookie consent SDK
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with opt-in mechanism
  • CSRF token present in forms
  • No exposed sensitive data in HTML
  • Use of secure cookies with SameSite=Lax

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Securiti.ai cookie consent
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and localized for Dutch market
  2. Comprehensive cookie consent and privacy mechanisms implemented
  3. Multiple booking and contact forms with CSRF protection
  4. Strong brand association with The Hertz Corporation
  5. Active social media presence linked
  6. No signs of phishing or malware
  7. Good SEO and structured data usage
  8. No explicit security policy or vulnerability disclosure page found
Technical notes

Notes

The website uses a modern front-end stack with Bootstrap 5, jQuery, and slick carousel for UI components. Google Tag Manager is used for analytics and marketing tags, and Securiti.ai manages cookie consent. The site is mobile responsive and SEO optimized with proper meta tags and structured data (JSON-LD). Performance is moderate, with some reliance on external CDNs and scripts. The CMS is not explicitly identified, suggesting a custom or proprietary platform. Technical debt appears low, but improvements in accessibility and security headers could enhance robustness. Hosting details are not disclosed, limiting infrastructure assessment.
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

Reviews of this site

Share your experience with thrifty.nl. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review thrifty.nl.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.