Views: 7
Summary – Without built-in security from the design phase, over 90% of web applications launch with vulnerabilities – human errors, outdated dependencies and default configurations – and incur up to 30× higher remediation costs in production. The rise of APIs, microservices and third-party SDKs multiplies attack surfaces, while neglected access controls, authentication and updates create critical vectors.
Solution: adopt Security by Design (security requirements at scoping), automated DevSecOps pipelines, defense in depth, active monitoring and ongoing team training.
Web application security is often seen as a secondary step, just another budget line to add after development. Many rely on a WAF to cover gaps or delegate the task to their service provider.
In fact, over 90% of projects are flawed from the design phase, and fixing these vulnerabilities in production can cost up to 30 times more than addressing them early on. It’s not just about securing an application after the fact, but preventing it from being born vulnerable. This article outlines the structural, technical, and organizational levers to avoid building an inherently fragile web app.
Why web applications are structurally vulnerable
Most vulnerabilities take root in the application’s design. Every component introduces a potential attack vector if not anticipated.
The human factor: code, bugs and oversights
Code—whether written in-house or outsourced—remains human work. Every line may contain a bug or miss an edge case. Even with rigorous code reviews, omissions persist, especially for exceptional flows or less-traveled paths.
Developers often work under pressure, constrained by tight deadlines or loaded roadmaps. Under this strain, some tests are skipped and documentation isn’t always updated. Projects then evolve on unstable code, without sufficient safeguards to detect deviations from best practices.
Beyond coding errors, configuration oversights—such as missing strict input validation or access controls—stack up to create weak links. The more layers of code accumulate, the higher the risk of a flaw, and the harder it becomes to fix once in production.
Explosion of attack surfaces
A modern application is no longer just a front end and back end. It relies on APIs, microservices, serverless functions, cloud integrations, and often third-party SDKs. Each interaction point is now a potential entry door for an attacker.
The rise of cloud and distributed architectures has multiplied contact points. Trust zones vanish: a misconfigured third-party microservice, an exposed S3 bucket, or a Lambda function without network restrictions can compromise an entire system.
This complexity requires dynamic mapping of all communications between components. Without this exhaustive view, it’s impossible to ensure no critical endpoint escapes proper monitoring or filtering.
Uncontrolled dependencies
<a href=
