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Security report for semrush.com

Semrush · Technology · United States

Low risk. 2 critical or high findings in Security headers and GDPR outside view.

Security score

86/100

Risk levelLow

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

Semrush is a leading SaaS platform specializing in online visibility management and content marketing, offering a comprehensive suite of AI-powered tools for SEO, PPC, content creation, social media, and traffic analysis. The company targets marketing professionals, agencies, and enterprises, positioning itself as a market leader trusted by millions and many Fortune 500 companies. The website demonstrates a mature digital infrastructure with modern technologies such as React, Google Analytics, and advanced tracking tools, ensuring fast performance and excellent mobile optimization. Security posture is strong with HTTPS enforcement and cookie consent mechanisms, though explicit security headers and incident response policies could be more visible. The absence of WHOIS registrant data is likely due to privacy protection and does not detract from the site's legitimacy. Overall, Semrush presents a professional, trustworthy, and technically sound online presence.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
73/ 100 · Medium
Checks completed
6of 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

2 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 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. GDPR outside view

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

    • 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

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

Keep watching semrush.com

This scan found 9 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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  • 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
100
Security headers
65
DNS health
90
Network security
100
GDPR outside view
73
Average
86

Not counted

  • Email security: 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

Technical appendix

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

Business context

Business profile

Semrush holds a strong market position as a comprehensive marketing software suite with a broad customer base and extensive service offerings. Its business model is subscription-based SaaS, generating revenue through tiered plans and enterprise solutions. The company leverages partnerships and maintains active investor and career portals, indicating organizational maturity. Its marketing tools cover a wide spectrum from SEO to AI-driven advertising, appealing to diverse customer segments. The presence of affiliate programs and extensive analytics integration suggests a sophisticated marketing ecosystem. Semrush's brand consistency and trust signals, including testimonials and awards, reinforce its competitive advantage in the digital marketing technology sector.

Security posture

The website employs HTTPS with strong SSL configuration and uses multiple security and analytics scripts asynchronously to minimize performance impact. Cookie consent and privacy policies indicate compliance with GDPR and related regulations. However, explicit security headers like Content-Security-Policy and X-Frame-Options are not clearly visible in the provided data, and no dedicated security or incident response pages were found. There is no evidence of vulnerabilities or exposed sensitive data. The security maturity is good but could be enhanced by publishing formal security policies and vulnerability disclosure programs to improve transparency and incident readiness.

Recommendations

  1. Conduct a security headers audit and implement missing headers such as Content-Security-Policy and X-Frame-Options.
  2. Publish a dedicated security policy and incident response page to improve transparency and user trust.
  3. Implement and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Regularly review third-party scripts and tracking tools to minimize privacy risks and ensure compliance.
  5. Enhance WHOIS data transparency if possible, or provide official domain registration information on the website.

Contact details published on the site

Addresses
Legal name
Semrush
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Semrush
Description
Semrush is an online visibility management and content marketing SaaS platform offering AI-powered marketing tools for SEO, PPC, content, social media, and traffic analysis.
Key services
SEO keyword research and audits, Backlink analysis, Traffic and market analysis, Content marketing tools, Social media management, Advertising and PPC campaign optimization, AI-powered marketing insights
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Google Analytics, Intercom, CookieHub, SpeedCurve Lux, Webpack, React (implied by JSX and webpack chunks)
Frameworks
React
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security and analytics scripts asynchronously
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Google Analytics, Google Tag Manager, Amplitude, Sentry, Mouseflow
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ads, Meta Ads, DoubleClick, Bing Ads, LinkedIn Ads, Yahoo Ads, TikTok Analytics
Tracking pixels
Amplitude, Sentry, Mouseflow, Marketo, CookieHub
Marketing tools
Semrush Marketing Suite, Google Ads, Meta Ads
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 professional design.
  2. Strong brand presence with multiple testimonials and trusted client logos.
  3. Comprehensive marketing and SEO tool offerings with AI integration.
  4. Good privacy and cookie policies with consent mechanisms.
  5. Extensive use of analytics and tracking technologies.
  6. No visible security vulnerabilities or exposed sensitive data.
  7. WHOIS data is unavailable or redacted, common for large enterprises.
  8. No WAF or blocking detected, indicating normal access.
Technical notes

Notes

The website is built on a modern JavaScript framework (likely React) with webpack bundling, ensuring modular and efficient code delivery. It uses asynchronous loading for analytics and tracking scripts to optimize performance. The site is mobile-optimized with responsive design and accessibility features. DNS prefetching and preconnect hints improve resource loading times. The use of multiple analytics and marketing tools indicates a sophisticated data collection and user engagement strategy. No CMS is explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not evident from the data. Overall, the technical infrastructure supports a fast, scalable, and user-friendly experience aligned with enterprise-grade SaaS standards.
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. 80/100Low24 findingsView report
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