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CVE-2025-61591— Cursor CLI's Cursor Agent MCP OAuth2 Communication is Vulnerable to Remote Code Execution

Quick assessment

Affected
cursor cursor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cursor是Cursor开源的一个 AI 代码编辑器。 Cursor 1.7及之前版本存在操作系统命令注入漏洞，该漏洞源于OAuth身份验证过程中可能返回特制命令，可能导致命令注入和远程代码执行。

CVSS 8.8 · High EPSS 1.16% · P65
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I. Basic Information for CVE-2025-61591

Vulnerability Information
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Vulnerability Title
Cursor CLI's Cursor Agent MCP OAuth2 Communication is Vulnerable to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
Cursor is a code editor built for programming with AI. In versions 1.7 and below, when MCP uses OAuth authentication with an untrusted MCP server, an attacker can impersonate a malicious MCP server and return crafted, maliciously injected commands during the interaction process, leading to command injection and potential remote code execution. If chained with an untrusted MCP service via OAuth, this command injection vulnerability could allow arbitrary code execution on the host by the agent. This can then be used to directly compromise the system by executing malicious commands with full user privileges. This issue does not currently have a fixed release version, but there is a patch, 2025.09.17-25b418f.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cursor 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cursor是Cursor开源的一个 AI 代码编辑器。 Cursor 1.7及之前版本存在操作系统命令注入漏洞，该漏洞源于OAuth身份验证过程中可能返回特制命令，可能导致命令注入和远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cursor cursor <= 1.7 -

II. Public POCs for CVE-2025-61591

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III. Intelligence Information for CVE-2025-61591

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Same Patch Batch · cursor · 2025-10-03 · 6 CVEs total

CVE-2025-61592 8.8 HIGH Cursor CLI: Arbitrary Code Execution Possible through Permissive CLI Config
CVE-2025-59944 8.1 HIGH Cursor IDE: Sensitive File Overwrite Bypass is Possible
CVE-2025-61590 7.5 HIGH Cursor is vulnerable to RCE via .code-workspace files using Prompt Injection
CVE-2025-61593 7.1 HIGH Cursor CLI Agent: Sensitive File Overwrite Bypass
CVE-2025-61589 5.9 MEDIUM Cursor: Potential Information Leakage via Mermaid Diagram

IV. Related Vulnerabilities

Same product: cursor
Same vendor: cursor
Same weakness: CWE-78

V. Comments for CVE-2025-61591

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