CVE-2025-54136 – Cursor Remote Code Execution Vulnerability

CVE ID : CVE-2025-54136

Published : Aug. 2, 2025, 12:15 a.m. | 1 hour, 22 minutes ago

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.

Severity: 7.2 | HIGH

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