Website Security Audit Services | Expert Vulnerability Assessment Since 2003

Why Your Business Needs Professional Website Security Audit Services

Cyberattacks cost businesses an average of €4.35 million per data breach (IBM, 2023). Yet over 60% of small and mid-sized companies that suffer a major breach close within six months. The threat isn’t theoretical — it’s a daily reality that affects e-commerce stores, SaaS platforms, corporate websites, and every digital asset in between.

A professional website security audit is a systematic evaluation of your web application, server infrastructure, and data flows to identify exploitable weaknesses before an attacker does. It goes far beyond a simple website vulnerability scan; it combines automated tooling with expert manual analysis to uncover the risks that scanners alone miss.

If your website handles customer data, processes payments, or represents your brand, you cannot afford to skip this step. Lueur Externe has been helping businesses across France and internationally secure their digital presence since 2003 — with more than 500 projects delivered and counting.

What Our Web Security Assessment Covers

Not all audits are created equal. A surface-level scan might flag outdated plugins but miss a critical authentication bypass buried in custom code. Our web security assessment follows a proven, multi-layered methodology aligned with OWASP Top 10 and industry best practices.

Comprehensive Audit Phases

• Reconnaissance & Asset Mapping — We map every endpoint, subdomain, API route, and third-party integration connected to your website.
• Automated Website Vulnerability Scan — Industry-leading scanners identify known CVEs, misconfigurations, outdated libraries, and SSL/TLS weaknesses.
• Manual Penetration Testing Website — Our engineers simulate real-world attack scenarios including SQL injection, cross-site scripting (XSS), broken access controls, and business logic flaws.
• Server & Infrastructure Review — We assess your hosting environment, firewall rules, DNS configuration, and AWS (or other cloud) security posture.
• Code Review (Optional) — For custom-built applications, we perform static and dynamic analysis of your source code to catch vulnerabilities at the root.
• Compliance Verification — We check alignment with GDPR, PCI DSS, and any sector-specific regulations that apply to your business.

Deliverables You Receive

Deliverable	What It Includes	Business Value
Executive Summary	High-level risk overview in plain language	Share directly with stakeholders and board members
Technical Report	Detailed findings with CVSS severity scores	Your dev team knows exactly what to fix and how
Prioritised Remediation Roadmap	Step-by-step fix plan ranked by risk and effort	Allocate budget and resources efficiently
Re-Test Verification	Follow-up scan after fixes are applied	Confirm vulnerabilities are truly resolved
Compliance Checklist	GDPR / PCI DSS alignment status	Avoid regulatory fines and build customer trust

Every report is written so that both technical teams and business decision-makers can take immediate action.

Concrete Use Cases: Who Benefits Most

Our website security audit services are designed for any organisation with a digital footprint, but here are the scenarios where we deliver the most impact:

E-Commerce Platforms

A Prestashop merchant in Nice discovered — through our audit — a payment-bypass vulnerability that could have exposed 12,000+ stored credit card numbers. We identified the flaw during manual penetration testing, provided a same-day patch, and helped the client achieve PCI DSS compliance within three weeks.

SaaS & Web Applications

A Paris-based SaaS company preparing for Series A funding needed a third-party security assessment to satisfy investor due diligence. Lueur Externe completed a full-stack audit in 8 business days, uncovering 4 critical and 11 medium-severity issues. The remediation roadmap allowed the team to close every finding before the funding deadline.

Corporate & Institutional Websites

A tourism board in the Alpes-Maritimes region engaged us after a defacement attack damaged their public image. Our post-incident audit identified the initial entry point (an unpatched CMS plugin), and we hardened the entire infrastructure to prevent recurrence — achieving a 98+ security score on subsequent external benchmarks.

Why Choose Lueur Externe for Your Security Audit

Choosing the right partner matters as much as the audit itself. Here’s what sets us apart:

• 20+ Years of Expertise — Founded in 2003 on the French Riviera, we combine deep technical knowledge with a mature, structured approach to web security assessment.
• Certified Specialists — Our team holds AWS Solutions Architect and Prestashop Expert certifications, ensuring we understand modern cloud-native and e-commerce architectures inside out.
• 500+ Projects Delivered — From local SMEs to international brands, our track record speaks for itself.
• No False Sense of Security — We don’t just run an automated website vulnerability scan and call it a day. Manual penetration testing is included in every engagement because real attackers don’t rely on automated tools alone.
• Actionable, Not Academic — Every finding comes with a concrete fix, estimated effort, and business-risk context. You’ll never receive a 200-page report with no clear next step.
• French Riviera, Global Reach — Based in Alpes-Maritimes (06), we serve clients across France and internationally, in French and English.

Our Proven Security Audit Process

Step 1: Free Discovery Call

We learn about your website, tech stack, business goals, and compliance requirements. No obligation, no jargon.

Step 2: Scoping & Proposal

You receive a clear, fixed-price proposal outlining exactly what will be tested, the methodology, timeline, and deliverables.

Step 3: Audit Execution

Our engineers conduct the full web security assessment — automated scans, manual penetration testing, and infrastructure review — with minimal disruption to your operations.

Step 4: Reporting & Remediation Support

Within 48 hours of completing the audit, you receive your full report and remediation roadmap. We walk you through the findings on a video call and answer every question.

Step 5: Re-Test & Certification

Once your team (or ours) applies the fixes, we re-test to confirm every vulnerability is resolved. You receive a clean audit certificate you can share with partners and customers.

Don’t Wait for a Breach — Act Now

Every day your website goes unaudited is a day you’re exposed to threats you can’t see. Whether you’re handling sensitive customer data, processing transactions, or simply protecting your brand’s reputation, a professional website security audit is the smartest investment you’ll make this year.

Lueur Externe is ready to help. With 500+ successful projects since 2003, certified expertise in AWS and Prestashop, and a commitment to clear, actionable results, we make website security straightforward and effective.

→ Request your free security audit quote now or call our team directly. The first step to a secure website takes less than two minutes.