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.
History

Mon, 04 Aug 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 04 Aug 2025 08:30:00 +0000

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First Time appeared Cursor
Cursor cursor
Vendors & Products Cursor
Cursor cursor

Fri, 01 Aug 2025 23:30:00 +0000

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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.
Title Cursor's Modification of MCP Server Definitions Bypasses Manual Re-approvals
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-08-01T23:08:21.817Z

Updated: 2025-08-04T17:16:42.841Z

Reserved: 2025-07-16T23:53:40.510Z

Link: CVE-2025-54136

cve-icon Vulnrichment

Updated: 2025-08-04T17:16:38.537Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-08-02T00:15:25.290

Modified: 2025-08-04T15:06:15.833

Link: CVE-2025-54136

cve-icon Redhat

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