Security advisory

{
  "id": "afe9178d683eafdb2610d2f213057a10cc12dff1679e3c5e46960295481b2c41",
  "url": "https://osv.dev/vulnerability/CVE-2018-20145",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20145",
    "summary": "Eclipse Mosquitto 1.5.x before 1.5.5 allows ACL bypass: if the option per_listener_settings was set to true, and the default listener was in use, and the default listener specified an acl_file, then the acl file was being ignored.",
    "evidence": "osv:CVE-2018-20145",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-20145",
      "aliases": [
        "CVE-2018-20145"
      ],
      "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/eclipse-mosquitto/mosquitto",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5e60136449d678948520085985d7e7f91f9e601c"
                },
                {
                  "fixed": "66dfa573946425661626e2f574ef125ab01b01f5"
                },
                {
                  "fixed": "9097577b49b7fdcf45d30975976dd93808ccc0c4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.5"
                      },
                      {
                        "fixed": "1.5.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9097577b49b7fdcf45d30975976dd93808ccc0c4"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.4",
            "v1.5.3",
            "v1.5.2",
            "v1.5.1",
            "v1.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20145.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-20145-5abb4622",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "237389952011881478287382112648987743294",
                    "272451151438414953003976969110111933824",
                    "51697838977234724229644107283187418883",
                    "282321170269120821608752377155100442388"
                  ]
                },
                "source": "https://github.com/eclipse-mosquitto/mosquitto/commit/9097577b49b7fdcf45d30975976dd93808ccc0c4",
                "target": {
                  "file": "src/conf.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-20145-700270e5",
                "digest": {
                  "length": 6844,
                  "function_hash": "327595239859168560702558468712667619739"
                },
                "source": "https://github.com/eclipse-mosquitto/mosquitto/commit/9097577b49b7fdcf45d30975976dd93808ccc0c4",
                "target": {
                  "file": "src/conf.c",
                  "function": "config__parse_args"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:24:25Z"
          }
        }
      ],
      "modified": "2026-10-20T13:24:25.090637137Z",
      "provider": "osv",
      "references": [
        "https://github.com/eclipse/mosquitto/blob/master/ChangeLog.txt",
        "https://github.com/eclipse/mosquitto/commit/9097577b49b7fdcf45d30975976dd93808ccc0c4",
        "https://github.com/eclipse/mosquitto/issues/1073"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20145",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387637,
  "published_at": "2018-12-13T20:29:00.24+00:00"
}