Security advisory

{
  "id": "ed54b793cfe9662cdc8e55b3addc764c30b9e7c02105fdbb27aa4c41a313277e",
  "url": "https://osv.dev/vulnerability/CVE-2021-30487",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-30487",
    "summary": "In the topic moving API in Zulip Server 3.x before 3.4, organization administrators were able to move messages to streams in other organizations hosted by the same Zulip installation.",
    "evidence": "osv:CVE-2021-30487",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2021-30487",
      "aliases": [
        "CVE-2021-30487"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zulip/zulip",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e46bbf18ebb1aef49319a69dcabf319e2a2c939a"
                },
                {
                  "fixed": "974b95b0956e6be5ef43683fbfac951d6460c802"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0"
                      },
                      {
                        "fixed": "3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3",
            "3.2",
            "3.1",
            "4.0-dev",
            "3.0",
            "3.0-rc2",
            "3.0-rc1",
            "3.0-dev"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-30487.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:21.100076957Z",
      "provider": "osv",
      "references": [
        "https://blog.zulip.com/2021/04/14/zulip-server-3-4/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-30487",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430418,
  "published_at": "2021-04-15T00:15:13.247+00:00"
}