Interactive Application Security Testing (IAST) is a dynamic approach to identifying vulnerabilities in running web applications, offering deeper insights than traditional static code analysis. Integrated into an IDE, IAST ensures continuous security checks during development, detecting risks in real-time. The HCL AppScan JetBrains Plugin exemplifies this integration, enabling developers to adopt a "shift-left" approach by detecting vulnerabilities early in the development cycle. This combination streamlines security testing, enhancing application security from the start.