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Security report for paessler.com

Paessler GmbH · Technology · Germany

Low risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

78/100

Risk levelLow

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

Paessler GmbH is a well-established German technology company specializing in network and IT infrastructure monitoring solutions. Their flagship product, PRTG, offers comprehensive monitoring capabilities for small to enterprise-scale environments, including cloud-hosted and enterprise-specific versions. The company targets IT professionals and enterprises seeking reliable, real-time monitoring to prevent downtime and optimize performance. With over 25 years of experience and a large global user base, Paessler holds a strong market position in the IT monitoring sector. Technically, the website is built on the Neos CMS platform using the Flow PHP framework, leveraging modern JavaScript libraries and Google Tag Manager for analytics and marketing. The site is well-optimized for performance, mobile responsiveness, and SEO, providing a professional user experience. Privacy and cookie policies are present with consent mechanisms, reflecting good compliance practices. Security-wise, the site enforces HTTPS, includes anti-clickjacking scripts, and offers a vulnerability disclosure program, indicating a mature security posture. However, explicit security policies and incident response details are not publicly disclosed, and WHOIS data is unavailable, which slightly reduces transparency. Overall, the site demonstrates strong security hygiene and trustworthiness. The overall risk assessment is low, with recommendations to enhance transparency around security policies, publish a security.txt file, and disclose data protection officer contact details to further improve compliance and trust. The website and business present a credible, professional front with robust technical and security foundations.

Scanned

This is an earlier scan of paessler.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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. GDPR outside view

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

    • 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

  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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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Keep watching paessler.com

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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
75
Security headers
80
Email security
80
DNS health
80
Network security
100
GDPR outside view
53
Average
78

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention paessler.com, from OffSeq Breach.

Total records
1,173
Employees
9
Customers
1,091
Third parties
73
Weak passwords
15%

Latest record dated 2025-12-23 · 24 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for paessler.com.

Select it in the checkout above.

Masked preview

  • –helpdesk.paessler.com2025-12-23
  • –crm.paessler.com2025-08-27
  • –erp.paessler.com2025-08-18
  • –adfs.paessler.com2025-08-18
  • –helpdesk.paessler.com2025-08-02

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Paessler GmbH operates in the technology sector, focusing on IT infrastructure monitoring software. Their business model includes software licensing, SaaS offerings, training, and consulting services. The company serves a broad range of customers from small businesses to large enterprises, emphasizing ease of use and comprehensive monitoring features. Their competitive advantages include a long market presence, a large user base, and a diverse product portfolio tailored to various infrastructure sizes and needs. The partnership ecosystem includes official portals for partners, MSPs, and customers, supporting sales and support channels. Growth indicators include extensive multilingual support, active content marketing, and a strong online presence. Strategic observations highlight the company's focus on innovation, customer satisfaction, and expanding cloud-based monitoring solutions.

Security posture

Paessler's security posture is solid, with HTTPS enforced site-wide, presence of security headers, and anti-clickjacking measures. The company maintains a vulnerability disclosure program, encouraging responsible reporting of security issues. However, the absence of a publicly available detailed security policy and incident response plan limits full transparency. No exposed sensitive data or vulnerable libraries were detected in the website content. Privacy compliance is supported by comprehensive privacy and cookie policies with consent mechanisms, aligning with GDPR requirements. Incident response contact channels such as security@ or abuse@ emails were not found. Overall, the security maturity is good but could be improved by publishing more explicit security governance documentation and appointing a visible Data Protection Officer.

Recommendations

  1. Publish a detailed security policy and incident response plan on the website to enhance transparency.
  2. Implement and publish a security.txt file to facilitate automated vulnerability reporting.
  3. Disclose Data Protection Officer contact information to improve GDPR compliance visibility.
  4. Regularly audit and update third-party libraries and scripts to mitigate potential vulnerabilities.
  5. Enhance user trust by showcasing relevant certifications and compliance frameworks.

Contact details published on the site

Addresses
Legal name
Paessler GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Paessler GmbH
Description
Paessler produces PRTG, a powerful network monitoring software that monitors IT infrastructure 24/7 and alerts users to problems before they notice.
Key services
PRTG Network Monitor, PRTG Enterprise Monitor, PRTG Hosted Monitor, Monitoring extensions, Training and consulting
Content quality
excellent
Branding
consistent

Technology

Stack
PHP, JavaScript, Google Tag Manager, Convertexperiments, CookieLaw.org scripts
Frameworks
Neos CMS, Flow PHP framework
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Anti-clickjacking script present
  • Cookie consent mechanism
  • Vulnerability disclosure program

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Convertexperiments
Marketing tools
Convertexperiments, CookieLaw.org
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 branding and consistent design
  3. Comprehensive product and solution descriptions
  4. Multiple language support with hreflang tags
  5. Use of modern web technologies and frameworks
  6. Presence of privacy and cookie policies with consent mechanisms
  7. Contact information clearly displayed with physical address, email, and phone
  8. No signs of adult or questionable content
  9. No WAF or blocking detected
  10. WHOIS data unavailable, which reduces transparency but site appears legitimate
Technical notes

Notes

The website is built on the Neos CMS platform with the Flow PHP framework, indicating a modern and flexible technical infrastructure. It uses JavaScript modules, Google Tag Manager for analytics, and Convertexperiments for A/B testing or personalization. Cookie consent is managed via CookieLaw.org scripts. The site is well-structured with semantic HTML, responsive design, and optimized images, contributing to fast loading times and excellent mobile usability. SEO best practices are followed with proper meta tags, Open Graph, and JSON-LD structured data. No significant technical debt or outdated technologies were identified. Opportunities include further automation of security monitoring and enhanced accessibility features.
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

Earlier scans of this domain

  1. 84/100Low24 findingsView report
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