TEST YOUR V0-GENERATED COMPONENTS FOR VULNERABILITIES
V0 generates beautiful React components in seconds. Are they safe to ship? Find out what the generator quietly skipped.
TEST YOUR V0 COMPONENTS NOW
Enter your deployed V0-built app URL to check for security vulnerabilities.
What V0 Optimizes For — and What It Skips
V0 is optimized for producing visually-correct React and shadcn/ui components from prompts. That’s it. The generator is not grading itself on input sanitization, component isolation, or data flow audit.
When you paste a V0 component into production, you inherit whatever assumptions the model made. If it assumed dangerouslySetInnerHTML was safe because the parent “probably validates input” — that’s on you now.
Security Gaps Specific to V0 Output
- Visual-first generation: Components look right. Validation logic is usually an afterthought.
- shadcn defaults: Many components rely on default props that don’t enforce sanitization
- Prop-drill exposure: State passed through many components can leak between scopes
- Inline script risks: Generated code sometimes includes inline handlers that fight your CSP
Common V0 Vulnerabilities
XSS VIA UNESCAPED INPUT
User-provided strings rendered directly without React's escaping — via innerHTML or raw props.
STATE EXPOSURE
Sensitive data held in client state that ships to every user of the component.
VALIDATION BYPASSES
Forms that only validate on the client, trusting the UI to block bad input.
CSP-BREAKING INLINE SCRIPTS
Inline handlers and eval-like patterns that force unsafe CSP settings.
How the V0 Scanner Works
- Crawl: We visit each route in your deployed app and capture its DOM and network calls
- Inject probes: We fuzz form inputs, URL params, and storage values with attack payloads
- Detect reflection: Reflected input in the DOM is flagged and graded by severity
- Report: You get a per-component breakdown with paste-ready fix prompts
Coverage Highlights
- DOM-based XSS detection across every route
- Form validation tests (client-only vs server-enforced)
- State-exposure checks in React DevTools dumps
- Inline script / CSP diagnostics
- Accessibility issues that double as security signals
Start Now
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COMMON QUESTIONS
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