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Web Security Audit for Swiss SMEs

Our ISO 27001 and NIST CSF compliant web security audits identify vulnerabilities in your site and provide a concrete remediation plan — 45% of enterprise flaws remain unpatched after 12 months (Edgescan 2025), often due to a lack of method.

Is your website truly secure?

SQL injections, XSS flaws and misconfigured access controls are the most common entry points on business websites. Exploitation of these vulnerabilities rose by 34% in 2025 (Verizon DBIR 2025) — with 45% remaining unpatched after 12 months (Edgescan 2025), often due to a lack of visibility.

A web security audit gives you a clear picture of your exposure before a third party exploits it. In 2024, 62,954 cyber incidents were reported in Switzerland (BACS 2025) — unaudited SMEs are the most affected. Our clients receive a prioritised report and an action plan, not just a list of problems.

Secure Your Website

Web Security: Protect Your Online Presence

Our web security audits follow the technological controls of ISO 27001:2022 (Annex A) and the NIST CSF. Each audit produces a detailed report with an action plan prioritised by criticality. At Bexxo, we detect an average of 12 to 15 critical vulnerabilities per audited SME.

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Vulnerability Analysis and Correction

  • Full scan of your site
  • Correction of identified flaws
  • Detailed report of actions
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Protection Against Common Cyberattacks

Verification of protections against SQL injection, XSS, CSRF and brute force. 88% of web attacks exploit stolen credentials or OWASP Top 10 vulnerabilities (Verizon DBIR 2025).

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Communication Security

Verification of SSL/TLS, HTTPS, security headers (HSTS, CSP, X-Frame-Options). Protection against ClickJacking and data interception.

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Access Reinforcement

Audit of forms, administration areas and authentication policies (MFA). 22% of breaches start with compromised credentials (Verizon DBIR 2025).

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Monitoring and Maintenance

Continuous monitoring via CVE Find, security updates, tested backups. An audit is not a one-shot exercise — security must be maintained.

Test Types

Types of Security Tests

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White Box

White box tests involve a thorough assessment of the internal architecture and source codes. These tests allow us to understand the internal workings of the system and identify potential vulnerabilities.

  • Le plus complet
  • Le plus cher
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Grey Box

Grey box tests combine elements of white box and black box tests. In this approach, we have partial knowledge of the system's internal architecture, or even the source codes. These tests are effective for identifying vulnerabilities related to design flaws.

  • Le standard
  • Complet et réaliste
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Black Box

Black box tests, or external security tests, evaluate the system without any prior knowledge. We therefore produce external attacks to identify vulnerabilities exploitable from the outside. This method is particularly useful for assessing the application's security from the perspective of a potential attacker.

  • Le moins complet
  • Point de vue du pirate

Comparison of testing methodologies

CriterionWhite BoxGrey BoxBlack Box
KnowledgeSource code + architecturePartial access (user)None (external attacker)
PerspectiveInternal developerUser with accountHacker
DepthMaximum (code + infra)BalancedAttack surface
Average duration5 to 10 days3 to 7 days2 to 5 days
Relative costHigherStandardMore affordable
Ideal forIn-depth pre-production auditStandard SME auditExternal resistance test
Bexxo recommendationPremium PackageStandard PackageEssential Package

Why conduct a security audit for your site?

A website is often a company's first gateway into the digital world. Without adequate protection, it becomes a prime target for cyberattacks. A cybersecurity audit helps identify vulnerabilities before they are exploited.

  1. Identify vulnerabilities before attackers do — 45% of enterprise vulnerabilities remain unpatched after 12 months (Edgescan 2025).
  2. Comply with nLPD — fines of up to CHF 250,000 in the event of a personal data breach.
  3. Protect customer data — average cost of a breach: USD 4.44M (IBM 2025).
  4. Safeguard your reputation — 87% of customers refuse to do business with a compromised company (McKinsey).
  5. Obtain a prioritised action plan — know exactly what to fix first, by criticality.
  6. Demonstrate your due diligence — the audit report serves as evidence in the event of a FDPIC inspection.

Anticipate risks with Bexxo: our audits follow ISO 27001 and NIST CSF standards for complete, documented protection of your online presence.

Web Security Audit

Protect your web presence

Your website is your company's showcase, but it also represents a potential target for cyberattacks. At bexxo, we offer an in-depth web security audit specially designed for SMEs. Our experts examine your online presence, identify vulnerabilities, and provide you with practical recommendations. Whether you use a popular CMS or a custom solution, our audit helps you strengthen your defenses and protect your customers' data. With bexxo, transform your website into a true digital fortress.

Discover our Web plans
Bexxo?

Why choose Bexxo?

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Certified Expertise

CyberSafe Label certified and authorized to handle confidential data for federal institutions, our experts apply the highest security standards in the industry.

II

Personalized Support

We adapt our services to your specific needs, whether you are an SME or a large company.

III

Proactive Protection

We anticipate threats before they become a problem, thereby reducing risks and the impact of attacks.

Don't let your business be vulnerable to cyber threats. With Bexxo, secure your digital future today!

Frequently asked questions about web security audits

Does my WordPress site need a security audit?

Yes. WordPress powers 43% of websites worldwide and is by far the most targeted CMS by attackers. Vulnerabilities often come from third-party plugins, outdated themes and misconfigurations. A Bexxo audit checks all of these points, not just the WordPress core.

How long does a web audit take?

From 2 to 10 business days depending on the package and the complexity of the site. The Essential package takes 2 to 3 days, the Standard 3 to 7 days, the Premium 5 to 10 days. You receive a detailed report with a prioritised action plan at the end of the audit.

How much does a web security audit cost?

Our packages range from CHF 1,500 (Essential — 10 control points, automated scan, simplified report) to CHF 15,000 (Premium — 20 control points, in-depth penetration tests, API assessment, management presentation). The Standard package (CHF 3,000) is the most requested by Swiss SMEs.

Is the audit compliant with ISO 27001 and nFADP standards?

Yes. Our audits follow the controls of ISO 27001:2022 (Annex A — technological controls) and the NIST CSF as reference frameworks. The audit report can serve as proof of due diligence in the event of an FDPIC inspection under the nFADP.

What is a web security audit?

A web security audit is a methodical assessment of a website designed to identify exploitable vulnerabilities (SQL injections, XSS, CSRF, misconfigurations) and verify compliance with ISO 27001 and NIST CSF standards. At Bexxo, our audits cover 10 to 20 control points depending on the chosen package.

What is the difference between White Box, Grey Box and Black Box?

White Box analyses the source code and internal architecture (most comprehensive). Grey Box simulates a user with partial access (most balanced for SMEs). Black Box tests from the outside with no prior knowledge, like an attacker (most realistic). Bexxo recommends Grey Box as the standard for SMEs.
Yes. WordPress powers 43% of websites worldwide and is by far the most targeted CMS by attackers. Vulnerabilities often come from third-party plugins, outdated themes and misconfigurations. A Bexxo audit checks all of these points, not just the WordPress core.
From 2 to 10 business days depending on the package and the complexity of the site. The Essential package takes 2 to 3 days, the Standard 3 to 7 days, the Premium 5 to 10 days. You receive a detailed report with a prioritised action plan at the end of the audit.
Our packages range from CHF 1,500 (Essential — 10 control points, automated scan, simplified report) to CHF 15,000 (Premium — 20 control points, in-depth penetration tests, API assessment, management presentation). The Standard package (CHF 3,000) is the most requested by Swiss SMEs.
Yes. Our audits follow the controls of ISO 27001:2022 (Annex A — technological controls) and the NIST CSF as reference frameworks. The audit report can serve as proof of due diligence in the event of an FDPIC inspection under the nFADP.
A web security audit is a methodical assessment of a website designed to identify exploitable vulnerabilities (SQL injections, XSS, CSRF, misconfigurations) and verify compliance with ISO 27001 and NIST CSF standards. At Bexxo, our audits cover 10 to 20 control points depending on the chosen package.
White Box analyses the source code and internal architecture (most comprehensive). Grey Box simulates a user with partial access (most balanced for SMEs). Black Box tests from the outside with no prior knowledge, like an attacker (most realistic). Bexxo recommends Grey Box as the standard for SMEs.

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