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.
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Mon, 04 Aug 2025 18:15:00 +0000
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ssvc
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Mon, 04 Aug 2025 08:30:00 +0000
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Cursor
Cursor cursor |
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Cursor
Cursor cursor |
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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 |
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Metrics |
cvssV3_1
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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

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

Status : Awaiting Analysis
Published: 2025-08-02T00:15:25.290
Modified: 2025-08-04T15:06:15.833
Link: CVE-2025-54136

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