CVE Details
Basic Information
| Title | Cursor’s Modification of MCP Server Definitions Bypasses Manual Re-approvals |
|---|---|
| Type | cve |
| Published | 2025-08-01T23:08:21.817Z |
| Modified | 2025-08-01T23:08:21.817Z |
Product Information
| Vendor | cursor |
|---|---|
| Product | cursor |
| Version | < 1.3 |
CVSS Information
| Base Score | 7.2 (HIGH) |
|---|---|
| Attack Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
AI Analysis
| AI Description | A vulnerability in Cursor versions 1.2.4 and below allows attackers to achieve remote code execution by modifying trusted MCP configurations. This can be done without triggering warnings, making it a significant security risk. |
|---|---|
| AI Severity | Medium |
| AI Vendor | Cursor |
| AI Product | Cursor Code Editor |
| AI Version | 1.2.4 and below |
Affected Products
- cursor cursor < 1.3
Additional Information
| CWE List | CWE-78 |
|---|---|
| Source | GitHub_M |
Description
Cursor is a code editor built for programming with AI. In versions 1.2.4 and below, attackers can achieve remote and persistent code execution by modifying an already trusted MCP configuration file inside a shared GitHub repository or editing the file locally on the target’s machine. Once a collaborator accepts a harmless MCP, the attacker can silently swap it for a malicious command (e.g., calc.exe) without triggering any warning or re-prompt. If an attacker has write permissions on a user’s active branches of a source repository that contains existing MCP servers the user has previously approved, or allows an attacker has arbitrary file-write locally, the attacker can achieve arbitrary code execution. This is fixed in version 1.3.