CVE-2025-54133: Cursor's MCP Install Deeplink Does Not Show Arguments in its User-Dialog

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-02 · updated 2026-06-17
Weakness: CWE-78

Description

Cursor is a code editor built for programming with AI. In versions 1.17 through 1.2, there is a UI information disclosure vulnerability in Cursor's MCP (Model Context Protocol) deeplink handler, allowing attackers to execute 2-click arbitrary system commands through social engineering attacks. When users click malicious `cursor://anysphere.cursor-deeplink/mcp/install` links, the installation dialog does not show the arguments being passed to the command being run. If a user clicks a malicious deeplink, then examines the installation dialog and clicks through, the full command including the arguments will be executed on the machine. This is fixed in version 1.3.

Affected products

cursor: from 1.1.7 before 1.3 — fixed in 1.3

How to fix

Upgrade to a fixed version: cursor 1.3. Check the vendor advisory for mitigations.

References

https://github.com/cursor/cursor/security/advisories/GHSA-r22h-5wp2-2wfv

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