Security advisory

{
  "id": "759af1d342362847101f4e263c2bd6bb005394095ae6f50ddafce0442ad79d55",
  "url": "https://osv.dev/vulnerability/CVE-2017-9781",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-9781",
    "summary": "A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.4.0x prior to 1.4.0p6, allowing an unauthenticated remote attacker to inject arbitrary HTML or JavaScript via the _username parameter when attempting authentication to webapi.py, which is returned unencoded with content type text/html.",
    "evidence": "osv:CVE-2017-9781",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-9781",
      "aliases": [
        "CVE-2017-9781"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/Checkmk/checkmk",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3144d0a38c9ff1b290ae6f4489c5df34a2daaf65"
                },
                {
                  "last_affected": "b2fba42409c49b7ac589ce84301ce659b9373349"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:p1:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0-p1"
                      },
                      {
                        "last_affected": "1.4.0-p1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:p2:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0-p2"
                      },
                      {
                        "last_affected": "1.4.0-p2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:p3:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0-p3"
                      },
                      {
                        "last_affected": "1.4.0-p3"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:p4:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0-p4"
                      },
                      {
                        "last_affected": "1.4.0-p4"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:check_mk_project:check_mk:1.4.0:p5:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0-p5"
                      },
                      {
                        "last_affected": "1.4.0-p5"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.0",
            "1.4.0-p1",
            "1.4.0-p2",
            "1.4.0-p3",
            "1.4.0-p4",
            "1.4.0-p5",
            "v1.4.0p5",
            "v1.4.0p4",
            "v1.4.0p3",
            "v1.4.0p2",
            "v1.4.0p1",
            "v1.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-9781.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:41.815821891Z",
      "provider": "osv",
      "references": [
        "https://www.tenable.com/security/research/tra-2017-21"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-9781",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435219,
  "published_at": "2017-06-21T18:29:00.387+00:00"
}