🛡️ CVE-2025-54135
🟠 CVSS 8.5 — High ✅ No Known Exploit CWE-78 NVD
8.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.5
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE CWE-78
Public Exploit ✅ No
Source NVD
Published 2025-08-05
Updated 2026-06-02
Modified 2025-08-25
Fix URL N/A

Affected Packages

Software From version Fixed in
cursor — 1.3.9

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