Know the risks before you deploy. Understanding Cursor security vulnerabilities is the first step to building secure applications.
Instant results. See which risks apply to you.
Every platform has security risks—the key is understanding them. Cursor applications face specific vulnerabilities that, if left unaddressed, can lead to data breaches, financial loss, and reputational damage. This guide covers the real risks and practical mitigations.
Malicious content in MCP tool responses can execute arbitrary commands.
CVE-2025-54135 (CurXecute): Slack messages could trigger remote code execution.
Review MCP server sources. Avoid untrusted MCP integrations. Watch for suspicious tool calls.
Malicious .cursor/rules files execute when opening untrusted projects.
The 'Rules File Backdoor' vulnerability affects both Cursor and Copilot.
Enable Workspace Trust in settings. Review .cursor/ files before opening projects.
AI suggests vulnerable patterns: SQL injection, hardcoded secrets, weak auth.
Research shows ~40% of AI code suggestions contain security issues.
Review all AI suggestions critically. Run security scans on generated code.
Code sent to AI servers may expose proprietary logic or secrets.
Enable Privacy Mode. Use .cursorignore for sensitive files.
AI suggests non-existent packages that attackers could register.
LLMs hallucinate npm package names that attackers then create with malware.
Verify all package suggestions exist. Check package reputation before installing.
Real user data at risk of exposure
Financial and PCI compliance implications
Exposed keys lead to abuse and charges
May contain sensitive business data
Limited data but teaches insecure patterns
Most Cursor security risks are preventable with proper configuration. The majority of vulnerabilities we find are not complex exploits—they're missing settings and exposed credentials that automated scanning catches instantly.
Stop guessing. Run a free scan to see which Cursor security risks actually affect your app.
Scan Your App FreeThe most critical Cursor risks are: exposed credentials/API keys, missing database access controls, and weak authentication. These account for the majority of real-world breaches in Cursor applications.
If your app is public on the internet, it's being scanned constantly. Automated tools probe for common vulnerabilities within minutes of deployment. The question isn't if you'll be scanned, but whether attackers will find anything exploitable.
Yes, with proper security configuration. Cursor provides the tools for secure applications—you need to use them correctly. Configure access controls, manage secrets properly, add security headers, and scan before launch.
Start with a security scan to identify current vulnerabilities. Then: 1) Fix critical issues first (exposed secrets, missing access controls), 2) Enable email verification and strong passwords, 3) Add security headers, 4) Set up continuous scanning.
The core risks are similar across vibe coding platforms—they all have exposed secrets, missing access controls, and auth weaknesses. Cursor-specific risks relate to its particular tech stack and default configurations.
Key CVEs: CVE-2025-59944 (case-sensitivity file bypass), CVE-2025-54135 (CurXecute MCP RCE), CVE-2025-54136 (MCPoison persistent compromise). These primarily affect MCP integrations and workspace trust.
Last updated: January 16, 2026