FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

{
  "id": "598e2fc6bec84fa57c26215dc6d0fb73204f2ce44f836d3074879fe2e1bd0ece",
  "url": "https://osv.dev/vulnerability/CVE-2025-62801",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name",
    "summary": "FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0, a command-injection vulnerability lets any attacker who can influence the server_name field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor. This vulnerability is fixed in 2.13.0.",
    "evidence": "osv:CVE-2025-62801",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-62801",
      "aliases": [
        "CVE-2025-62801",
        "GHSA-rj5c-58rq-j5g5",
        "PYSEC-2026-1365"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/PrefectHQ/fastmcp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "716e50dae0b445fb7fd0251725fc827c045d5fdd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.13.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.13.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.13.0rc3",
            "v2.13.0rc2",
            "v2.13.0rc1",
            "v2.12.4",
            "v2.12.3",
            "v2.12.2",
            "v2.12.1",
            "v2.12.0rc1",
            "v2.12.0",
            "v2.11.3",
            "v2.11.2",
            "v2.11.1",
            "v2.11.0",
            "v2.10.6",
            "v2.10.5",
            "v2.10.4",
            "v2.10.3",
            "v2.10.2",
            "v2.10.1",
            "v2.10.0",
            "v2.9.2",
            "v2.9.1",
            "v2.9.0",
            "v2.8.1",
            "v2.8.0",
            "v2.7.1",
            "v2.7.0",
            "v2.6.1",
            "v2.6.0",
            "v2.5.2",
            "v2.5.1",
            "v2.5.0",
            "v2.4.0",
            "v2.3.5",
            "v2.3.4",
            "v2.3.3",
            "v2.3.2",
            "v2.3.1",
            "v2.3.0",
            "v2.3.0-rc.2",
            "v2.3.0-rc.1",
            "v2.2.10",
            "v2.2.9",
            "v2.2.8",
            "v2.2.7",
            "v2.2.6",
            "v2.2.5",
            "v2.2.3",
            "v2.2.4",
            "v2.2.2",
            "v2.2.1",
            "v2.2.0",
            "v2.1.2",
            "v2.1.1",
            "v2.1.0",
            "v2.0.0",
            "v1.0",
            "v0.4.1",
            "v0.4.0",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62801.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.784656178Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62801.json",
        "https://github.com/jlowin/fastmcp/security/advisories/GHSA-rj5c-58rq-j5g5",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-62801"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62801.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-62801",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518170,
  "published_at": "2025-10-28T21:36:41.167+00:00"
}