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Security report for c4all.de

C4all Gesellschaft mbH & Co. KG · Technology · Germany

Partial score · DNS & email only

75/100

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

C4all Gesellschaft mbH & Co. KG is a German-based digital marketing service provider specializing in telephony, SMS, video, and image services to help businesses analyze campaigns, track customer touchpoints, and acquire new clients. With over 10 years of experience and a client base of 175 companies, C4all positions itself as a reliable partner in the digital marketing ecosystem. The website is professionally designed, mobile-optimized, and provides clear navigation and relevant content tailored to business customers seeking marketing measurement and communication solutions. Technically, the site is built on Umbraco CMS with modern HTML5, CSS3, and JavaScript technologies, leveraging the uSkinned sitebuilder framework. While performance and SEO are adequate, there is room for improvement in accessibility and security headers. Security posture is moderate, with secure form handling and CAPTCHA but lacking visible security policies and headers. Privacy compliance is partially met with a privacy policy and GDPR consent checkbox but missing a cookie consent mechanism. Overall, the domain registration data aligns with the business claims, indicating legitimacy and consistency.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

1 finding 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

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

Keep watching c4all.de

This scan found 15 issues across 4 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

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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
Email security
70
DNS health
60
Network security
100
Average
76
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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 c4all.de, from OffSeq Breach.

No leaked records found

Breach holds no records for c4all.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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

C4all operates in the technology sector, focusing on digital marketing analytics and communication services. Their business model is B2B, targeting companies that require campaign tracking and customer engagement tools. The presence of reputable clients such as Das Örtliche and Gelbe Seiten enhances their market credibility. The company leverages partnerships with multiple digital service providers, indicating a collaborative ecosystem. Revenue streams likely derive from subscription or usage-based fees for call tracking, SMS, and video/image processing services. Growth indicators include a high volume of callbacks (60,000 per week) and a decade-long market presence. The company maintains a consistent brand image and professional online presence, supporting trust and customer acquisition.

Security posture

The website demonstrates a moderate security maturity level. The use of HTTPS is implied but not explicitly confirmed in the data. The contact form employs POST requests with CAPTCHA and GDPR consent, reducing spam and ensuring compliance. However, the absence of security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options reduces defense-in-depth. No vulnerability disclosures or incident response contacts are published, limiting transparency. No exposed sensitive data or vulnerable libraries were detected in the HTML content. Overall, the security posture is adequate for the business type but could be enhanced by implementing recommended headers and publishing security policies.

Recommendations

  1. Implement and publish a cookie consent banner to comply fully with GDPR requirements.
  2. Add security headers including CSP, HSTS, and X-Frame-Options to improve protection against common web attacks.
  3. Publish a security policy and incident response contact information to enhance transparency and trust.
  4. Consider adding a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Regularly audit and update third-party libraries and frameworks to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
C4all Gesellschaft mbH & Co. KG
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
C4all Gesellschaft mbH & Co. KG
Description
C4all offers services for telephony, SMS, videos, and images to analyze campaigns, track touchpoints, and acquire new customers.
Key services
Call Tracking, SMS Services, Video and Image Processing (V4All)
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript
Frameworks
uSkinned (sitebuilder)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Contact form uses POST with CAPTCHA
  • No exposed sensitive data in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is in German and professionally presented.
  3. Contact form includes CAPTCHA and GDPR consent checkbox.
  4. No explicit privacy or cookie banner detected, but privacy policy is present.
  5. No visible social media links found in the HTML content.
  6. Multiple reputable client logos displayed, enhancing trust.
  7. No security.txt or vulnerability disclosure found.
  8. No explicit security headers detected in provided data.
Technical notes

Notes

The website is built using Umbraco CMS and the uSkinned sitebuilder framework, with a responsive design leveraging Bootstrap-like CSS classes. The HTML is well-structured with appropriate meta tags for SEO and social media (Open Graph and Twitter cards). Performance is moderate, with lazy loading of images and videos to optimize load times. Accessibility features such as skip links and ARIA labels are present but could be improved. The contact form includes validation and CAPTCHA to prevent spam. No major technical debt or outdated technologies were detected, but the absence of advanced security headers and cookie consent mechanisms indicates areas for modernization.
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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