Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Anysphere | Cursor | < 1.3.9 |
Related Weaknesses (CWE)
References
- https://github.com/cursor/cursor/security/advisories/GHSA-4cxx-hrm3-49rmMitigationVendor Advisory
FAQ
What is CVE-2025-54135?
CVE-2025-54135 is a vulnerability with a CVSS score of 8.5 (HIGH). 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 bu...
How severe is CVE-2025-54135?
CVE-2025-54135 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-54135?
Check the references section above for vendor advisories and patch information. Affected products include: Anysphere Cursor.