Ströer SE & Co. KGaA · Media · Germany
Low risk. 1 critical or high finding in SSL/TLS.
Ströer SE & Co. KGaA is a prominent German advertising and media company specializing in out-of-home advertising, digital advertising, and dialog marketing. The company is publicly listed on the MDAX and targets advertisers and marketing professionals with a comprehensive suite of media services. The website reflects a mature digital presence with a professional design and clear branding consistent with a large enterprise in the media sector. Technically, the website is built on TYPO3 CMS and employs modern analytics and consent management tools such as Matomo and Cookiebot. The site is mobile-optimized, accessible, and SEO-friendly, indicating a high level of digital maturity. Hosting and DNS are managed via Cloudflare, ensuring reliable performance and security. From a security perspective, the site enforces HTTPS, implements standard security headers, and respects user privacy preferences through a robust cookie consent mechanism. No critical vulnerabilities or exposed sensitive data were detected. However, explicit security policies and incident response contacts are not publicly available, representing an area for improvement. Overall, the website is trustworthy, compliant with GDPR, and professionally managed. Strategic recommendations include publishing detailed security and incident response policies, adding vulnerability disclosure information, and providing direct contact details for data protection officers to enhance transparency and user 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.
1 finding rated critical or high. Fix these first.
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 19 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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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 stroeer.de, from OffSeq Breach.
3 subdomains affected
See the 10 newest leaked credentials
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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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