CVE-2025-54135

Cursor is a code editor built for programming with AI. Cursor allows writing in-workspace files with no user approval in versions below 1.3.9, If the file is a dotfile, editing it requires approval but creating a new one doesn't. Hence, if sensitive MCP files, such as the .cursor/mcp.json file don't already exist in the workspace, an attacker can chain a indirect prompt injection vulnerability to hijack the context to write to the settings file and trigger RCE on the victim without user approval. This is fixed in version 1.3.9.

Affected products

Cursor

Anysphere Cursor

< 1.3.9

Fix

Available

CVSS 3.1

9.8 CRITICAL

EPSS

1.7% (76th percentile)

Weakness

CWE-829, CWE-78

NVD status

Analyzed

Published

2025-08-05