Cursor Security Issues
The most common security vulnerabilities in Cursor applications—and how to fix them before attackers find them.
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7 Security Issues Documented
Common vulnerabilities found in Cursor applications
Critical Security Issues
AI-Suggested Credentials in Code
criticalCursor may suggest placeholder credentials that developers accept as-is.
Exposed secrets if placeholders are real patterns or if developers use actual keys.
Search for password=, apiKey=, secret= assignments in code.
Review all AI suggestions. Never accept credential suggestions without replacement.
SQL Injection in Generated Queries
criticalAI may generate database queries using string concatenation instead of parameterization.
Database compromise, data theft, potential server takeover.
Review database queries for string concatenation with user input.
Always use parameterized queries or ORM methods that handle escaping.
High Severity Issues
Missing Input Validation
highAI-generated code often assumes valid input without checking.
Injection attacks, type confusion, application crashes.
Send malformed input to endpoints and check responses.
Add input validation using zod, joi, or similar libraries.
Insecure Data Fetching Patterns
highCode fetching sensitive data without proper auth checks.
Data leakage, unauthorized access to resources.
Review data fetching code for missing auth verification.
Always verify user authentication and authorization before data access.
Workspace Trust Vulnerability
highCursor has Workspace Trust disabled by default, allowing malicious .cursor/rules files to execute.
Arbitrary code execution when opening malicious projects.
Check Cursor settings for Workspace Trust configuration.
Enable Workspace Trust in settings. Review .cursor/rules in new projects.
Medium Severity Issues
Privacy Mode Not Enabled
mediumCode sent to AI servers without privacy protections.
Potential exposure of proprietary code and secrets.
Check Cursor settings for Privacy Mode status.
Enable Privacy Mode for sensitive codebases. Use .cursorignore for secrets.
Outdated Dependency Suggestions
mediumAI may suggest older versions of packages with known vulnerabilities.
Known CVEs in dependencies, potential exploitation.
Run npm audit or similar dependency scanner.
Always verify and update dependencies. Run security audits regularly.
How to Prevent These Issues
- Run automated security scans before every deployment
- Configure database access controls (RLS/Security Rules) first
- Store all secrets in environment variables, never in code
- Enable email verification and strong password policies
- Add security headers to your hosting configuration
- Review AI-generated code for security before accepting
Find Issues Before Attackers Do
VAS scans your Cursor app for all these issues automatically. Scans from $5, instant results.
Get Starter ScanFrequently Asked Questions
What are the most common Cursor security issues?
The most common issues are: exposed API keys/secrets, missing database access controls (RLS or Security Rules), weak authentication configuration, and missing security headers. These account for over 80% of vulnerabilities in Cursor applications.
How do I find security issues in my Cursor app?
Run a VAS security scan for automated detection of common vulnerabilities. Manually check: database access controls, search code for hardcoded secrets, verify authentication settings, and test security headers. VAS catches all of these automatically.
Are Cursor security issues fixable?
Yes, nearly all Cursor security issues are configuration problems with straightforward fixes. Missing RLS, exposed secrets, weak auth—all have clear remediation steps. Most fixes take under an hour to implement.
How quickly can Cursor security issues be exploited?
Exposed databases and API keys can be discovered within minutes using automated scanners. Attackers actively scan for common patterns. This is why security configuration must happen before deployment, not after.
Does Cursor have built-in security?
Cursor provides security features, but they require configuration. Security isn't automatic—you must enable database access controls, manage secrets properly, configure auth settings, and add security headers. The tools exist; you must use them.
What are the Cursor MCP vulnerabilities?
CVE-2025-54135 (CurXecute) and CVE-2025-54136 (MCPoison) affect Cursor's Model Context Protocol. These allow prompt injection through MCP servers, potentially leading to remote code execution. The vulnerabilities are in how Cursor handles external tool responses.
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Last updated: January 16, 2026