CVE-2025-64106

Cursor: Speedbump Modal Bypass in MCP Server Deep-Link

State: Published
Severity: 8.8 High
Published: Nov 4, 2025
Updated: Nov 5, 2025
Reserved: Oct 27, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
cursorcursor	< 2.0Affected

References

https://github.com/cursor/cursor/security/advisories/GHSA-4575-fh42-7848

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