# CVE-2025-54135

## Summary

- **CVE ID:** CVE-2025-54135
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-78, CWE-829
- **Published:** Aug 5, 2025
- **Last Modified:** Mar 12, 2026

## 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.

## Affected Products

- cursor — cursor (< 1.3.9)

## References

- [CNA](https://github.com/cursor/cursor/security/advisories/GHSA-4cxx-hrm3-49rm)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.81%
- **EPSS Percentile:** 77.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._