Securing Your Business Software: The Essentials

Introduction

Every week, another business makes the news because of a data breach. Most of these breaches are not caused by sophisticated hackers. They are caused by basic security oversights in business software.

Whether you are building new software or maintaining an existing application, getting security right is non-negotiable. Here are the essentials that every business application needs.

Authentication and Access Control

Strong authentication is your first line of defense. At a minimum, every business application should support multi-factor authentication. Passwords alone are no longer enough, especially when employees reuse them across services.

Beyond authentication, implement role-based access control. Not every user needs access to every feature. Limit access to the minimum required for each role, and audit permissions regularly.

Data Encryption at Rest and in Transit

All data in transit should be encrypted using TLS. This means every API call, every form submission, and every file upload travels through an encrypted channel. No exceptions.

Data at rest should also be encrypted, especially sensitive information like personal data, financial records, and credentials. This is critical for applications like document management systems and client portals in healthcare. Modern databases and cloud services make this straightforward to implement.

Secure Development Practices

"The average cost of a data breach reached 4.45 million dollars in 2023, with breaches taking an average of 277 days to identify and contain."

— IBM Cost of a Data Breach Report 2023

Security is not something you bolt on at the end. It needs to be part of the development process from day one. This means code reviews with a security focus, automated vulnerability scanning in your CI pipeline, and keeping all dependencies up to date.

At MG Software, every pull request is reviewed for security issues before it is merged. We run automated tools that check for common vulnerabilities like SQL injection, cross-site scripting, and insecure deserialization.

Regular Audits and Incident Response

Even with the best practices in place, you need regular security audits. An external review once a year, combined with automated scanning on every deployment, gives you a strong security posture.

Equally important is having an incident response plan. When something does go wrong, how fast can you detect it? Who is responsible for containment? Having these answers ready before an incident occurs makes all the difference.

Where Client Portals Go Wrong in Practice

Most security incidents we encounter in projects we take over are not in the login, but in what happens after logging in. The classic example: a client portal that neatly displays invoice 4001, but where changing that number to 4002 reveals another customer's invoice. This authorization flaw, where the application checks whether someone is logged in but not whether that person may see the specific document, has topped the OWASP list of most common vulnerabilities for years. In 2026 this is more relevant than ever: AI coding assistants like Cursor and Claude Code generate working screens at remarkable speed, but the authorization layer around them remains human work that must be explicitly designed and tested.

Other recurring mistakes: sessions that stay valid for days on shared computers, password reset flows that reveal which email addresses have an account, and upload fields that accept any file type. Each is small to build, but together they determine whether your portal is a business card or a liability risk. When building web applications, we include these checks in the definition of done by default, so they do not depend on the discipline of an individual developer.

Finally: make sure you can look back. An audit log that records who opened which document and when is, in case of suspected abuse, the difference between having answers within an hour and guessing for days. For portals handling sensitive data, such as dashboards and client portals in healthcare or finance, such a log is also increasingly a contractual requirement from your own customers. So ask your vendor not only what has been built, but also what is being logged.

Conclusion

Software security does not have to be overwhelming. Start with the essentials: strong authentication, encryption, secure development practices, and regular audits. These four pillars cover the vast majority of threats.

If you are unsure about the security posture of your business application, MG Software offers security assessments that identify vulnerabilities and provide a clear remediation plan.

<strong>Update May 2026:</strong> Two developments have raised the security bar since this article first appeared. After the XZ Utils backdoor incident in early 2024, supply-chain reviews and signed dependencies are now standard practice in serious projects. AI-generated code introduces its own risks, requiring mandatory SAST and DAST scans before merging to production. On top of that, enforcement of the EU Cyber Resilience Act starts in 2027, with documentation, vulnerability handling, and update obligations for almost every product with digital elements. Use 2026 to prepare. Security in production cannot be retrofitted under deadline pressure.