Web & Application Security

Who We Are

At Obventum Cyber Security, we understand that web applications are often the primary target for attackers, serving as gateways to sensitive data, corporate systems, and client information. From e-commerce platforms and customer portals to internal business applications, even a single vulnerability can have massive financial, operational, and reputational consequences.

Our Web Application Security services help organizations in Croatia, the Netherlands, and Slovenia safeguard their applications across all industries — including finance, healthcare, e-commerce, government, and technology sectors. By combining manual testing with industry-standard frameworks, we ensure that every line of code is scrutinized, every endpoint is tested, and every potential exploit is addressed before attackers can find it.

Why Web Application Security Matters

Web applications are constantly under attack. Common threats include:

• SQL Injection, XSS, CSRF, and broken authentication vulnerabilities (OWASP Top 10).
• API security weaknesses exposing sensitive back-end systems.
• Insufficient session management enabling account takeover.
• Business logic flaws that can lead to financial or operational abuse.

Even the most sophisticated cloud or network defenses cannot protect against vulnerabilities hidden within applications themselves.

Our Approach

• Comprehensive Application Mapping
  We document all web applications, endpoints, APIs, and integrations to ensure no hidden or forgotten servicesremain untested.
• Manual Penetration Testing
  Our team performs in-depth, hands-on testing to identify complex vulnerabilities that automated tools often miss. We test in black-box, grey-box, and white-box scenarios depending on client requirements.
• OWASP Top 10 & Beyond
  Testing aligns with OWASP Top 10 standards, as well as additional frameworks such as NIST SP 800-115 and CWE/SANS Top 25 Most Dangerous Software Errors.
• API & Mobile Application Security
  We assess the full stack — from web front-end to APIs, microservices, and mobile endpoints — ensuring that integrated systems cannot be exploited as entry points.
• Detailed Reporting & Recommendations
  Every assessment concludes with a detailed report highlighting vulnerabilities, risk severity, proof-of-concept exploits, and prioritized remediation steps. This empowers development and security teams to fix issues effectively and prevent recurrence.

Client Impact Example

A financial technology company in Croatia discovered that its customer-facing payment portal had multiple high-severity vulnerabilities that could have allowed unauthorized transactions and data leakage.

Obventum’s team conducted a manual and automated pentest across web and API layers, uncovering:

• Broken authentication allowing session hijacking.
• Insufficient input validation leading to XSS attacks.
• Weak API access controls exposing sensitive endpoints.

After implementing our recommendations — including strong authentication, input sanitization, and API rate limiting — the company significantly reduced its attack surface and gained client trust.

Securing Web Applications Across Europe

Obventum has worked with multinational e-commerce platforms, government portals, healthcare providers, and financial institutions in Croatia, the Netherlands, and Slovenia. Our offensive-first methodology ensures that web applications are not only compliant but resilient, providing peace of mind for operators and their users.

What Our Clients Say

“Obventum uncovered weaknesses we didn’t even know existed. Their manual testing and detailed reports allowed us to secure our applications before any incidents occurred. Truly an essential partner in digital security.”

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