GHSA-Q66Q-FX2P-7W4M

Vulnerability from github – Published: 2025-07-01 20:13 – Updated: 2025-07-02 18:56
VLAI?
Summary
@modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling
Details

Versions of Filesystem prior to 0.6.3 & 2025.7.1 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 2025.7.1 to resolve.

Thank you to Elad Beber (Cymulate) for reporting these issues.

Severity ?
7.3 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@modelcontextprotocol/server-filesystem"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "@modelcontextprotocol/server-filesystem"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2025.1.14"
            },
            {
              "fixed": "2025.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-53109"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-07-01T20:13:56Z",
    "nvd_published_at": "2025-07-02T15:15:27Z",
    "severity": "HIGH"
  },
  "details": "Versions of Filesystem prior to 0.6.3 \u0026 2025.7.1 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 2025.7.1 to resolve.\n\nThank you to Elad Beber (Cymulate) for reporting these issues.",
  "id": "GHSA-q66q-fx2p-7w4m",
  "modified": "2025-07-02T18:56:39Z",
  "published": "2025-07-01T20:13:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-q66q-fx2p-7w4m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53109"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/servers/commit/d00c60df9d74dba8a3bb13113f8904407cda594f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/modelcontextprotocol/servers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@modelcontextprotocol/server-filesystem allows for path validation bypass via prefix matching and symlink handling"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.