Security advisory

{
  "id": "3d62d9f1c518afa5fe0aec1d6d38dd08c045c4dfbc729d878a1aa9ed4b0a1ae3",
  "url": "https://osv.dev/vulnerability/CVE-2020-28923",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-28923",
    "summary": "An issue was discovered in Play Framework 2.8.0 through 2.8.4. Carefully crafted JSON payloads sent as a form field lead to Data Amplification. This affects users migrating from a Play version prior to 2.8.0 that used the Play Java API to serialize classes with protected or private fields to JSON.",
    "evidence": "osv:CVE-2020-28923",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2020-28923",
      "aliases": [
        "CVE-2020-28923",
        "GHSA-v9mf-jgq3-c28h"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/playframework/playframework",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3c008185a851c26c8cf82ee46ddb0882086fce7b"
                },
                {
                  "last_affected": "002bfafc1426539234ee2546e0aec34f351bb03f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lightbend:play_framework:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.8.0"
                      },
                      {
                        "last_affected": "2.8.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.8.4",
            "2.8.3",
            "2.8.2",
            "2.8.1",
            "2.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28923.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:49.715350979Z",
      "provider": "osv",
      "references": [
        "https://www.playframework.com/security/vulnerability",
        "https://www.playframework.com/security/vulnerability/CVE-2020-28923-ImproperRemovalofSensitiveInformationBeforeStorageorTransfer"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-28923",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437060,
  "published_at": "2020-12-03T17:15:13.287+00:00"
}