ShieldNext
Mid Opportunity 6/10ShieldNext is an automated security scanning and hardening toolkit specifically built for Next.js applications. It continuously audits your codebase and API routes for XSS vulnerabilities, missing CSRF protection, authentication flaws, and serialization risks, then generates actionable fix suggestions and code patches. It's aimed at solo developers and small agencies who ship Next.js apps without a dedicated security team.
Target User
Freelance Next.js developers and small dev agencies (2-10 people) shipping SaaS products or client projects who lack a dedicated security engineer
Revenue Model
$29/month for solo devs, $99/month for teams up to 10 — targeting 300 solo + 80 team accounts = $16,500 MRR
Differentiator
Unlike generic security scanners (Snyk, SonarQube), ShieldNext understands Next.js-specific patterns — RSC serialization, API route conventions, NextAuth session handling — and produces Next.js-idiomatic fix code rather than abstract warnings
Based on Pain Points
Cross-Site Scripting (XSS) Vulnerabilities in Next.js
9XSS attacks can occur in Next.js through improper use of dangerouslySetInnerHTML, unvalidated user input in dynamic content, third-party scripts, and server-side rendering of malicious content.
Lack of Built-In CSRF Protection in Next.js
8Next.js does not include built-in Cross-Site Request Forgery protection, requiring developers to implement their own protection mechanisms or applications remain vulnerable to CSRF attacks.
Authentication and Authorization Flaws in Next.js
9Common vulnerabilities include insecure session management, weak token validation, missing authorization checks on API routes, and client-side only authentication without server-side validation.
API Route Security Issues in Next.js
9Next.js API routes are vulnerable to injection attacks (SQL, NoSQL, command injection), rate limiting bypass, information disclosure through error messages, and missing input validation.
React/Next.js serialization vulnerabilities expose TypeScript runtime risks
9Critical security vulnerabilities like React2Shell (CVE-2025-55182, CVSS 10.0) in Next.js RSC serialization revealed that full-stack JavaScript and TypeScript lack secure serialization models. These runtime CVEs forced developers to reassess security assumptions in TypeScript/React stacks.