Modern web applications are deeply reliant on JavaScript. From complex authentication flows to client-side business logic and undocumented API calls, JavaScript is a goldmine of intelligence for understanding how an application operates under the hood.

For security researchers, bug bounty hunters, and penetration testers, this translates to one critical reality: JavaScript files are packed with hidden attack surfaces.

However, analyzing JavaScript at scale is notoriously difficult. Production applications deploy heavily bundled, minified, or obfuscated scripts. Critical endpoints, hardcoded secrets, and vulnerable execution paths are easily buried beneath thousands of lines of unreadable code.

To solve this, I built ScriptRecon — an open-source JavaScript reconnaissance and Static Application Security Testing (SAST) tool engineered specifically to automate and deepen client-side security analysis.

The Blind Spot in Modern JS Reconnaissance

During a standard web security assessment, researchers scrape JavaScript files hoping to uncover:

  • Hidden or unauthenticated API endpoints
  • Hardcoded secrets, API keys, or access tokens
  • Client-side vulnerabilities (DOM XSS, etc.)
  • Sensitive, exposed business logic
  • Outdated, vulnerable third-party dependencies

But manual analysis hits a wall the moment you open a massive webpack bundle. Traditional scanners also fall short — they struggle to track how user input flows through complex functions, frequently miss obfuscated secrets, and often fail to correlate their findings into actionable proof-of-concepts.

Enter ScriptRecon

ScriptRecon is a comprehensive reconnaissance and SAST framework built to expose these hidden risks. It unifies static analysis, cross-procedural taint tracking, and entropy-based secret discovery into a single, high-performance workflow.

Whether you are a red team operator, a penetration tester, or an AppSec engineer, ScriptRecon is designed to make your JavaScript analysis faster, deeper, and highly actionable.

Core Capabilities

  • 🧠 Deep Taint Tracking: ScriptRecon executes cross-procedural taint tracking, mapping user-controlled input from source to sink. This allows for high-confidence detection of critical vulnerabilities like SQL Injection, XSS, SSRF, and RCE.
  • 🔐 Entropy-Based Secret Discovery: Developers frequently — and accidentally — hardcode credentials in client-side code. By leveraging Shannon entropy calculations alongside intelligent filtering, ScriptRecon hunts down exposed API keys, access tokens, and sensitive credentials that regex alone would miss.
  • 📦 Dependency Vulnerability Scanning: Modern apps are built on third-party packages. ScriptRecon parses these dependencies and flags known CVEs that introduce immediate risk to the application.
  • ⚡ Automated Exploit Generation: Finding a vulnerability is only half the battle. When an issue is identified, ScriptRecon automatically generates proof-of-concept (PoC) payloads to help you rapidly validate your findings.
  • 🤖 AI-Assisted Remediation: Beyond just breaking things, ScriptRecon helps fix them. It generates context-aware code patches, providing developers with immediate, actionable remediation steps.
  • 📊 SARIF Reporting for CI/CD: Export your findings in standard SARIF format, making it effortless to integrate ScriptRecon directly into enterprise CI/CD pipelines and broader security workflows.

Built for the Trenches: CLI & Web Dashboard

Flexibility is key during an engagement, so ScriptRecon offers two distinct ways to work:

1. Interactive Web Dashboard

Built with a modern React frontend, the dashboard provides a highly visual approach to vulnerability analysis. You can upload JS files, trace tainted execution flows, review AI-suggested code fixes, and explore severity-scored reports through an intuitive interface.

2. Powerful CLI for Red Teams

For those who live in the terminal, the CLI delivers raw speed. It supports interactive scanning, local file analysis, remote JS retrieval, and custom rule enforcement.

Plaintext

node run-v2.js --interactive
node run-v2.js --scan ./target.js
node run-v2.js --scan ./target.js --format sarif --output report.sarif

Privacy First by Design

In application security, OPSEC and data privacy are non-negotiable. ScriptRecon is built with a strict local-first architecture. All static analysis, taint tracking, and secret discovery run directly on your machine. Your target's source code and sensitive data never leave your system.

Try ScriptRecon Today

JavaScript remains one of the most lucrative sources of intelligence during a web application assessment. By combining advanced recon with deep static analysis, ScriptRecon reveals the attack surface that traditional tools miss.

If you are passionate about AppSec, vulnerability research, or building better security tools, I invite you to test it out.

🌐 Live Demo: scriptrecon.vercel.app

💻 GitHub Repository: HARSHA2396/scriptrecon

Security feedback, feature requests, and open-source contributions are always welcome!