Security advisory

{
  "id": "176861c388184df29816ae19cbea5df75068bc5442b6c2674b81628bcdd57c80",
  "url": "https://osv.dev/vulnerability/CVE-2019-18954",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-18954",
    "summary": "Pomelo v2.2.5 allows external control of critical state data. A malicious user input can corrupt arbitrary methods and attributes in template/game-server/app/servers/connector/handler/entryHandler.js because certain internal attributes can be overwritten via a conflicting name. Hence, a malicious attacker can manipulate internal attributes by adding additional attributes to user input.",
    "evidence": "osv:CVE-2019-18954",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-18954",
      "aliases": [
        "CVE-2019-18954",
        "GHSA-4x6v-rwh4-55jw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/netease/pomelo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4cbeab70a8f9f7d013c1164acf691bc0654c861d"
                },
                {
                  "last_affected": "4cbeab70a8f9f7d013c1164acf691bc0654c861d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:netease:pomelo:2.2.5:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2.5"
                      },
                      {
                        "last_affected": "2.2.5"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-18954.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:51.362462089Z",
      "provider": "osv",
      "references": [
        "https://github.com/NetEase/pomelo/issues/1149",
        "https://github.com/cl0udz/vulnerabilities/tree/master/pomelo-critical-state-manipulation"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-18954",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382255,
  "published_at": "2019-11-14T00:15:11.017+00:00"
}