{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "pocketmine/pocketmine-mp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-704"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-03-18T22:36:03Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nDue to a workaround applied in 1.13, an attacker may send a negative damage/meta value in a tool or armour item\u0027s NBT, which `TypeConverter` then blindly uses as if it was valid without being checked.\n\nWhen this invalid metadata value reaches `Durable-\u003esetDamage()`, an exception is thrown because the metadata is not within the expected range for damage values.\n\nThis can be reproduced with either a too-large damage value, or a negative one.\n\n### Patches\nc8e1cfcbee4945fd4b63d2a7e96025c59744d4f1\n\n### Workarounds\nIn theory this can be checked by plugins using a custom `TypeConverter`, but this is likely to be very cumbersome.\n\n### For more information\n* Email us at [team@pmmp.io](mailto:team@pmmp.io)",
  "id": "GHSA-46c5-pfj8-fv65",
  "modified": "2025-12-26T17:29:39Z",
  "published": "2022-03-18T22:36:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-46c5-pfj8-fv65"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/commit/c8e1cfcbee4945fd4b63d2a7e96025c59744d4f1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pmmp/PocketMine-MP"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improperly checked metadata on tools/armour itemstacks received from the client"
}