G&L Geißendörfer & Leschinsky GmbH · Media · Germany
Low risk. 2 critical or high findings in Security headers and SSL/TLS.
G&L Geißendörfer & Leschinsky GmbH is a well-established managed service provider specializing in streaming media delivery, offering live and on-demand audio and video services. With over two decades of experience, the company serves major German broadcasters, government agencies, and event organizers, positioning itself as a trusted partner in the media technology sector. Their key services include live and VoD streaming, CDN services, media delivery, system integration, software development, and 24/7 support. The company leverages partnerships with industry leaders such as Akamai and AWS to enhance its service offerings. Technically, the website is built on a modern stack including Bootstrap, jQuery, Font Awesome, and HubSpot CMS, ensuring good performance, mobile optimization, and accessibility. The presence of a comprehensive cookie consent mechanism and GDPR-compliant privacy policy reflects a mature approach to privacy and compliance. Hosting appears to be supported by Cloudflare, enhancing security and performance. Security-wise, the company demonstrates a strong posture with ISO 27001 certification prominently displayed, HTTPS enforced, and cookie consent management in place. However, explicit security headers are not detected, and no public incident response or vulnerability disclosure information is available, suggesting areas for improvement. No vulnerabilities or suspicious content were identified. Overall, the website and business present a professional, trustworthy, and secure image with high content quality and compliance standards. Strategic recommendations include enhancing security headers, publishing incident response contacts, and establishing a vulnerability disclosure policy to further strengthen security and trust.
Scanned
NIS2 Art. 21(2)
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.
2 findings rated critical or high. Fix these first.
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.
Prevents clickjacking attacks
What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"
TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.
SSL certificate uses 256-bit key, which is considered weak
What to do: Use at least 2048-bit RSA or 256-bit ECC key
Need hands-on remediation? Email guard@offseq.com
This scan found 17 issues across 5 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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Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention gl-systemhaus.de, from OffSeq Breach.
1 subdomain affected
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Breach keeps ingesting new leaks, so these numbers can grow between scans.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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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