{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b85046eb08ad38226ebd62f47856a2cb15d1154a"
            }
          ],
          "repo": "https://github.com/zulip/zulip",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-q3wg-jm9p-35fj"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-285"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32678.json"
  },
  "details": "Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.",
  "id": "CVE-2023-32678",
  "modified": "2026-04-01T23:09:05.700332510Z",
  "published": "2023-08-25T20:04:49.432Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-7-3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32678.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zulip/zulip/security/advisories/GHSA-q3wg-jm9p-35fj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-32678"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Zulip vulnerable to insufficient authorization check for edition/deletion of messages and topics in private streams by former subscribers"
}