CVE-2025-64106 HIGH

CVE-2025-64106: Cursor: Speedbump Modal Bypass in MCP Server Deep-Link

Vendor Cursor
Product cursor
Weakness CWE-78
Published November 4, 2025
Last update November 5, 2025

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Cursor is a code editor built for programming with AI. In versions 1.7.28 and below, an input validation flaw in Cursor's MCP server installation enables specially crafted deep-links to bypass the standard security warnings and conceal executed commands from users if they choose to accept the server. If an attacker is able to convince a victim to navigate to a malicious deeplink, the victim will not see the correct speedbump modal, and if they choose to accept, will execute commands specified by the attackers deeplink.

Key dates

02Disclosure timeline

November 4, 2025 CVE published
November 5, 2025 Record updated