Professional Single Page Application Testing Services

SPAs Security Tested

SPAs Had Client-Side Issues

Security Report Delivery

Frontend Vulnerabilities Found

SPAs have client-side security vulnerabilities

SPAs store sensitive data insecurely client-side

SPAs have npm dependency vulnerabilities

Average SPA security breach cost

⚡ DOM-Based XSS Testing

DOM-based XSS is the most critical SPA vulnerability. Our SPA XSS testing examines client-side JavaScript DOM manipulation identifying XSS in React components, Angular templates, Vue.js templates, and vanilla JavaScript. We test dangerous sinks including innerHTML, outerHTML, document.write, eval, and dangerouslySetInnerHTML in React identifying where user input flows into dangerous DOM operations. Frontend security testing validates input sanitization, output encoding, and Content Security Policy implementation preventing DOM-based cross-site scripting attacks.

Testing Focus: DOM manipulation, dangerous sinks, React dangerouslySetInnerHTML, Angular template injection, Vue.js template XSS, and CSP validation.

💾 Local Storage Security Testing

Local storage security testing examines sensitive data storage in browser storage mechanisms. We test local storage security identifying JWT tokens, API keys, and sensitive data stored in localStorage, session storage security validating sessionStorage usage, IndexedDB security examining structured data storage, and Web Storage API vulnerabilities. Our testing identifies sensitive data exposure through browser storage, insecure token storage enabling token theft via XSS, and client-side credential storage exposing authentication secrets.

Testing Focus: localStorage security, sessionStorage validation, IndexedDB assessment, sensitive data exposure, token storage, and credential protection.

🔐 Frontend Authentication Testing

SPA authentication testing examines client-side authentication implementation. We test JWT handling including token validation, expiration, and refresh mechanisms, token storage security in localStorage vs httpOnly cookies, frontend authentication bypass through client-side manipulation, and authentication state management in Redux/Vuex/NgRx. Our testing identifies authentication vulnerabilities unique to SPAs including token theft via XSS, insecure token refresh flows, and client-side authentication bypass enabling unauthorized access.

Testing Focus: JWT security, token storage, authentication bypass, refresh token handling, authentication state management, and session security.

🛡️ Client-Side Authorization Testing

SPA authorization testing validates access control enforcement. We test client-side routing security examining route guards in React Router, Angular Router, and Vue Router, SPA routing security ensuring protected routes validate authorization server-side, and authorization bypass through client-side manipulation. Our testing identifies authorization vulnerabilities where SPAs rely solely on client-side checks without backend validation enabling privilege escalation and unauthorized data access through frontend manipulation.

Testing Focus: Route guards, authorization bypass, client-side routing security, access control validation, and privilege escalation testing.

🔌 SPA API Security Testing

SPA API security testing examines REST API security and GraphQL security for SPA backends. We test API endpoint security including authentication, authorization, rate limiting, and input validation, CORS issues enabling unauthorized cross-origin requests, REST API security vulnerabilities in SPA backends, and GraphQL security including query depth limiting, introspection exposure, and authorization enforcement. Our testing ensures APIs properly validate client requests preventing unauthorized access through API exploitation.

Testing Focus: REST API testing, GraphQL security, CORS configuration, API authentication, rate limiting, and backend security validation.

📦 Dependency Vulnerability Testing

Dependency vulnerabilities testing examines npm package security and frontend dependencies. We identify dependency vulnerabilities in node_modules, vulnerable npm packages with known CVEs, outdated dependencies requiring updates, and supply chain vulnerabilities. Our testing analyzes package.json and package-lock.json identifying security issues in React, Angular, Vue dependencies plus third-party libraries. We assess bundler security in webpack, Vite, and Rollup configurations ensuring secure build processes.

Testing Focus: npm security audit, dependency CVEs, outdated packages, supply chain security, and bundler configuration review.

🗺️ State Management Security

State management security testing examines Redux, Vuex, NgRx, and other state management solutions. We test sensitive data exposure in application state, state manipulation through browser DevTools, insecure state persistence, and state synchronization vulnerabilities. Our testing identifies scenarios where sensitive data like passwords, tokens, or personal information persist in state exposing data through client-side inspection or state logging in development mode accidentally enabled in production.

Testing Focus: Redux security, Vuex validation, state exposure, sensitive data in state, state manipulation, and persistence security.

🔍 Source Map Exposure Testing

Source map exposure testing identifies production source maps revealing application source code. We test for source map exposure through .map files, sensitive data exposure in source code including API keys and secrets, JavaScript security through code review of exposed source, and TypeScript security examining type definitions. Our testing identifies scenarios where webpack or bundler misconfiguration exposes source maps enabling attackers to understand application logic, discover hidden endpoints, and extract embedded secrets.

Testing Focus: Source map exposure, embedded secrets, code logic analysis, hidden endpoint discovery, and bundler configuration.

⚠️ Client-Side Validation Bypass

Client-side validation testing examines validation bypass vulnerabilities. We test client-side validation in forms, input sanitization effectiveness, validation logic bypass through browser manipulation, and backend validation absence. Our client-side security testing identifies scenarios where SPAs rely solely on JavaScript validation without server-side checks enabling attackers to submit malicious data, bypass business rules, or inject payloads by circumventing client-side controls.

Testing Focus: Validation bypass, client-side checks, backend validation, input sanitization, and business logic enforcement.

🔒 CSP & Security Headers Testing

CSP implementation testing validates Content Security Policy effectiveness protecting against XSS. We test CSP policy configuration, CSP bypass techniques, unsafe-inline and unsafe-eval usage, security header implementation including X-Frame-Options, X-Content-Type-Options, and Strict-Transport-Security. Our testing identifies weak CSP policies enabling XSS exploitation, missing security headers exposing SPAs to attacks, and CSP implementation issues reducing XSS protection effectiveness.

Testing Focus: CSP validation, CSP bypass, security headers, XSS protection, frame options, and transport security configuration.

Frontend Security Specialists

Our team specializes in JavaScript framework security with extensive React, Angular, and Vue.js expertise. They have performed 900+ SPA penetration tests identifying 12,000+ frontend vulnerabilities. Our certified testers understand client-side security, DOM-based XSS, modern JavaScript frameworks, and SPA-specific attack vectors ensuring comprehensive frontend security testing.

• JavaScript security experts
• React/Angular/Vue specialists
• 10+ years frontend testing
• 900+ SPAs security tested

All Framework Coverage

We provide specialized React security testing, Angular security testing, Vue.js security testing, and testing for Svelte, Next.js, Nuxt.js, and other modern frameworks. Each framework has unique security considerations requiring specialized knowledge ensuring comprehensive JavaScript application testing across all popular SPA frameworks and libraries.

• React & Next.js testing
• Angular framework security
• Vue.js & Nuxt.js assessment
• All modern SPA frameworks

DOM-Based XSS Expertise

Our SPA XSS testing includes comprehensive DOM-based XSS assessment identifying vulnerabilities automated scanners miss. We manually review dangerous sinks, DOM manipulation, React dangerouslySetInnerHTML, Angular template injection, and Vue.js XSS ensuring complete protection against client-side cross-site scripting attacks unique to single page applications.

• DOM-based XSS testing
• Dangerous sink analysis
• Framework-specific XSS
• Manual security review

Detailed SPA Security Report

Every single page app security audit includes comprehensive documentation covering all frontend vulnerabilities, DOM-based XSS findings, local storage issues, authentication vulnerabilities, API security problems, and framework-specific issues. Reports include React, Angular, or Vue-specific remediation guidance helping frontend developers fix vulnerabilities correctly.

• Executive summary
• Framework-specific findings
• Code examples included
• Developer-friendly guidance

Dependency Security Audit

Our testing includes comprehensive npm package security assessment identifying dependency vulnerabilities, outdated packages, and supply chain risks. We analyze node_modules, package.json dependencies, and bundler configurations ensuring your SPA doesn’t inherit vulnerabilities from third-party libraries compromising application security.

• npm security audit
• Dependency CVE mapping
• Supply chain security
• Package update recommendations

Frontend Development Support

Professional SPA security testing services include ongoing remediation support, secure frontend development guidance, React/Angular/Vue security best practices, and free re-testing. We help frontend teams implement CSP, fix DOM-based XSS, secure state management, and maintain ongoing SPA security ensuring continuous protection.

• 60-day remediation support
• Secure coding guidance
• Framework best practices
• Free comprehensive re-testing

SPA Discovery & Analysis

Framework Identification:

• Framework detection (React/Angular/Vue)
• Client-side routing analysis
• API endpoint discovery
• State management identification
• Dependency tree analysis
• Build configuration review

Static Code Analysis

Source Review:

• Source map analysis if exposed
• JavaScript code review
• Dangerous sink identification
• Hardcoded secret detection
• npm dependency audit
• Bundler configuration review

Dynamic Security Testing

Runtime Assessment:

• DOM-based XSS testing
• Authentication/authorization testing
• Local storage security testing
• API security testing
• Client-side validation bypass
• State management exploitation

Reporting & Remediation

Documentation & Support:

• Comprehensive SPA security report
• Framework-specific findings
• Code examples and proof of concepts
• React/Angular/Vue remediation
• Dependency update recommendations
• 60-day support and re-testing

Basic SPA Assessment

Essential frontend security testing

Small single page applications

• Single framework (React/Angular/Vue)
• DOM-based XSS testing
• Basic client-side testing
• Authentication security testing
• Local storage assessment
• SPA security report
• 30-day support

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Professional SPA Testing

Comprehensive SPA security

Most SPAs and modern apps

• Any framework (React/Angular/Vue)
• Complete DOM-based XSS testing
• State management security
• Authentication & authorization
• Local/session storage testing
• API security testing
• Dependency vulnerability audit
• Source map analysis
• CSP & security headers
• Executive presentation
• 60-day support
• One free re-test

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Enterprise SPA Security

Complete frontend assessment

Complex enterprise SPAs

• Multi-framework applications
• Advanced DOM XSS analysis
• Complete state management audit
• Comprehensive API testing
• GraphQL security testing
• WebSocket security
• Service worker assessment
• Complete dependency audit
• Source code security review
• Custom framework testing
• Micro-frontend security
• Executive presentation with Q&A
• 90-day premium support
• Unlimited re-testing

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SafetyBis React security testing discovered critical DOM-based XSS in our components. Their SPA penetration testing found JWT tokens stored insecurely in localStorage. The comprehensive dependency audit identified 47 vulnerable npm packages we didn’t know about. Professional single page application testing that prevented a major security incident!

We needed Angular security testing for our enterprise application. Their comprehensive SPA security audit found authorization bypass through client-side routing, state management vulnerabilities, and API security issues. The framework-specific remediation guidance was invaluable. Best frontend security testing we’ve received!

Their Vue.js security testing was exactly what we needed. Found client-side injection vulnerabilities, insecure state management, and local storage issues. The SPA API security testing secured our GraphQL backend. Frontend security specialists who actually understand modern JavaScript frameworks. Highly recommend!

What is single page application testing?

Single page application testing is specialized security assessment targeting modern JavaScript frameworks and client-side vulnerabilities. Professional SPA penetration testing examines React, Angular, and Vue.js applications identifying DOM-based XSS, local storage security issues, client-side injection, insecure authentication, authorization bypass, and frontend-specific attack vectors. SPA security assessment differs from traditional web testing because single page applications execute logic client-side creating unique vulnerabilities including state management weaknesses, Web Storage API issues, client-side routing security problems, and JavaScript framework-specific flaws requiring specialized frontend security testing expertise.

How much does SPA security testing cost?

SPA security testing cost varies based on application complexity and framework. Basic single page app security audit costs $3,500-5,000 for small React/Angular/Vue applications. Professional SPA penetration testing ranges $8,000-12,000 for comprehensive assessment including DOM-based XSS, API security, and dependency audits. Enterprise SPA testing costs $14,000-20,000 for complex applications with micro-frontends, GraphQL, and advanced features. React security testing, Angular security testing, and Vue.js security testing have similar pricing. Investment prevents SPA breaches averaging $4.1 million making professional frontend security testing extremely cost-effective.

Do you test all JavaScript frameworks?

Yes! Our single page application testing services include React security testing for React and Next.js, Angular security testing for Angular applications, Vue.js security testing for Vue and Nuxt.js, plus testing for Svelte, Ember, Backbone, and custom frameworks. We also test hybrid frameworks, micro-frontends, and progressive web apps. Each JavaScript framework has unique security considerations requiring specialized knowledge ensuring comprehensive JavaScript application testing across all modern frontend frameworks and libraries.

What SPA vulnerabilities do you test for?

Our comprehensive single page app security audit tests DOM-based XSS in React/Angular/Vue, local storage security issues exposing tokens, session storage vulnerabilities, insecure authentication including JWT handling, authorization bypass through client-side routing, state management weaknesses in Redux/Vuex/NgRx, API security including REST and GraphQL, client-side injection, client-side validation bypass, CORS misconfigurations, CSP implementation weaknesses, dependency vulnerabilities in npm packages, source map exposure, sensitive data exposure, insecure deserialization, and framework-specific security issues ensuring complete SPA security coverage.

How often should we perform SPA security testing?

Minimum: comprehensive SPA penetration testing before major releases ensuring new features don’t introduce frontend vulnerabilities. Recommended: SPA security assessment after significant framework updates, dependency changes, or authentication modifications. Best practice: continuous frontend security testing throughout development catching client-side vulnerabilities early. Essential: immediate testing after discovering vulnerabilities in framework dependencies or similar applications. Regular professional single page application testing maintains ongoing security posture preventing exploitation of DOM-based XSS, local storage issues, and other SPA-specific vulnerabilities.

What’s included in the SPA security report?

Every single page app security audit includes comprehensive documentation covering executive summary, DOM-based XSS findings with proof of concepts, local storage security issues, authentication vulnerabilities, authorization bypass techniques, state management weaknesses, API security problems, dependency vulnerability list, framework-specific findings, code examples showing vulnerabilities, React/Angular/Vue-specific remediation guidance, CSP recommendations, security headers assessment, and SPA security testing methodology documentation. Reports provide complete information enabling frontend developers to effectively remediate vulnerabilities using framework-specific best practices.

900+ SPAs Tested

Frontend expertise

Framework Specialists

React/Angular/Vue experts

DOM XSS Experts

Client-side security

60-Day Support

Complete remediation help