{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0a7d3d3fe28bc1abc931e39fe2d7083798310a21"
            },
            {
              "fixed": "0df7bd71f32f3b772e2646c6ab0d60c9b610addf"
            }
          ],
          "repo": "https://github.com/zulip/zulip",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21630.json"
  },
  "details": "Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite users and create multi-use invitations, and has also configured only admins to be able to invite users to streams. As in CVE-2023-32677, this does not let users invite new users to arbitrary streams, only to streams that the inviter can already see. Version 8.1 fixes this issue. As a workaround, administrators can limit sending of invitations down to users who also have the permission to add users to streams.",
  "id": "CVE-2024-21630",
  "modified": "2026-04-01T23:08:02.135558700Z",
  "published": "2024-01-25T19:30:09.106Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://zulip.com/help/configure-who-can-invite-to-streams"
    },
    {
      "type": "WEB",
      "url": "https://zulip.com/help/restrict-account-creation#change-who-can-send-invitations"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21630.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zulip/zulip/security/advisories/GHSA-87p9-wprh-7rm6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zulip/zulip/security/advisories/GHSA-mrvp-96q6-jpvc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21630"
    },
    {
      "type": "FIX",
      "url": "https://github.com/zulip/zulip/commit/0df7bd71f32f3b772e2646c6ab0d60c9b610addf"
    }
  ],
  "related": [
    "GHSA-87p9-wprh-7rm6",
    "GHSA-mrvp-96q6-jpvc"
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Zulip non-admins can invite new users to streams they would not otherwise be able to add existing users to"
}