CVE-2025-54136
Severity CVSS v4.0:
Pending analysis
Type:
CWE-78
OS Command Injections
Publication date:
02/08/2025
Last modified:
04/08/2025
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.
Impact
Base Score 3.x
7.20
Severity 3.x
HIGH