Security advisory

{
  "id": "6ff6cdc5ae729c4a594145ff4676844f9dd36202e8b422935ec4caf91439e4c9",
  "url": "https://osv.dev/vulnerability/CVE-2021-33806",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33806",
    "summary": "The BDew BdLib library before 1.16.1.7 for Minecraft allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of its use of Java serialization.",
    "evidence": "osv:CVE-2021-33806",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-33806",
      "aliases": [
        "CVE-2021-33806"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bdew-minecraft/bdlib",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "447210530ceec72fb3374efecb0930ed359d2297"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "447210530ceec72fb3374efecb0930ed359d2297"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.9.4",
            "v1.9.3",
            "v1.9.2",
            "v1.9.1",
            "v1.9.0",
            "v1.8.2",
            "v1.8.1",
            "v1.8.0",
            "v1.7.1",
            "v1.7.0",
            "v1.6.5",
            "v1.6.4",
            "v1.6.3",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.1",
            "v1.5.0",
            "v1.4.5",
            "v1.4.4",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.1.0",
            "v1.0.1",
            "v1.0.0",
            "v0.9.5",
            "v0.9.4",
            "v0.9.3",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33806.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:48.267056876Z",
      "provider": "osv",
      "references": [
        "https://bdew.net",
        "https://vuln.ryotak.me/advisories/46",
        "https://www.curseforge.com/minecraft/mc-mods/bdlib/files/3331330",
        "https://github.com/bdew-minecraft/bdlib/commit/447210530ceec72fb3374efecb0930ed359d2297"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:bdew:bdlib:*:*:*:*:*:minecraft:*:*"
            ],
            "vendor_product": "bdew:bdlib",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.16.1.7"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.16.1.7"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-33806",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384648,
  "published_at": "2021-06-03T12:15:07.797+00:00"
}