Security advisory

{
  "id": "6a27eb2c5805b298d62193fd0d8c5177c51e67ff4bc21f3adcd91fd7571add56",
  "url": "https://osv.dev/vulnerability/CVE-2018-20684",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20684",
    "summary": "In WinSCP before 5.14 beta, due to missing validation, the scp implementation would accept arbitrary files sent by the server, potentially overwriting unrelated files. This affects TSCPFileSystem::SCPSink in core/ScpFileSystem.cpp.",
    "evidence": "osv:CVE-2018-20684",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-20684",
      "aliases": [
        "CVE-2018-20684"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/winscp/winscp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "d3f40c5aa777f9f8ccf8f49bbd1e10a49deee337"
                },
                {
                  "fixed": "49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.13.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.13.7",
            "5.13.6",
            "5.13.5",
            "5.13.4",
            "5.13.3",
            "5.13.2",
            "5.13.1",
            "5.13",
            "5.12.2",
            "5.12.1",
            "5.12",
            "5.11.3",
            "5.11.2",
            "5.11.1",
            "5.11",
            "5.10.4",
            "5.10.3",
            "5.10.2",
            "5.9.6",
            "5.10.1",
            "5.10",
            "5.9.5",
            "5.9.4",
            "5.9.3",
            "5.9.2",
            "5.9.1",
            "5.9",
            "5.8.4",
            "5.8.3",
            "5.8.2",
            "5.7.7",
            "5.8.1",
            "5.8",
            "5.7.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20684.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-20684-7e525f07",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "190059343526321250718249722846150668288",
                    "265185899346947669849958001449947920961",
                    "207441580209763168162942788988296410514",
                    "96551852497919177171655564292665931904"
                  ]
                },
                "source": "https://github.com/winscp/winscp/commit/49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54",
                "target": {
                  "file": "source/core/ScpFileSystem.cpp"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-20684-8f05019a",
                "digest": {
                  "length": 7337,
                  "function_hash": "94415055861517891977301272192252666951"
                },
                "source": "https://github.com/winscp/winscp/commit/49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54",
                "target": {
                  "file": "source/core/ScpFileSystem.cpp",
                  "function": "TSCPFileSystem::SCPSink"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:35:10Z"
          }
        }
      ],
      "modified": "2026-10-20T13:35:10.173981326Z",
      "provider": "osv",
      "references": [
        "https://www.oracle.com/security-alerts/cpujan2020.html",
        "https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt",
        "https://winscp.net/eng/docs/history",
        "https://github.com/winscp/winscp/commit/49d876f2c5fc00bcedaa986a7cf6dedd6bf16f54",
        "https://winscp.net/tracker/1675"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20684",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387844,
  "published_at": "2019-01-10T21:29:00.297+00:00"
}