Cursor up to 1.2.4 os command injection

Summaryinfo

A vulnerability classified as critical has been found in Cursor up to 1.2.4. Affected by this issue is some unknown functionality. This manipulation causes os command injection. This vulnerability appears as CVE-2025-54136. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Cursor up to 1.2.4. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-54136 since 07/17/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 1.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23405). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• Cursor

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4

Website

• Product: https://github.com/cursor/cursor/

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Be aware that VulDB is the high quality source for vulnerability data.

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