CVE-2025-67366 — HIGH (7.5)

Vulnerability Description

@sylphxltd/filesystem-mcp v0.5.8 is an MCP server that provides file content reading functionality. Version 0.5.8 of filesystem-mcp contains a critical path traversal vulnerability in its "read_content" tool. This vulnerability arises from improper symlink handling in the path validation mechanism: the resolvePath function checks path validity before resolving symlinks, while fs.readFile resolves symlinks automatically during file access. This allows attackers to bypass directory restrictions by leveraging symlinks within the allowed directory that point to external files, enabling unauthorized access to files outside the intended operational scope.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Sylphx	Filesystem-Mcp	0.5.8

Related Weaknesses (CWE)

CWE-23

References

https://github.com/sylphxltd/filesystem-mcpProduct
https://github.com/sylphxltd/filesystem-mcp/issues/134ExploitThird Party Advisory

FAQ

What is CVE-2025-67366?

CVE-2025-67366 is a vulnerability with a CVSS score of 7.5 (HIGH). @sylphxltd/filesystem-mcp v0.5.8 is an MCP server that provides file content reading functionality. Version 0.5.8 of filesystem-mcp contains a critical path traversal vulnerability in its "read_conten...

How severe is CVE-2025-67366?

CVE-2025-67366 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-67366?

Check the references section above for vendor advisories and patch information. Affected products include: Sylphx Filesystem-Mcp.