{
  "cveId": "CVE-2023-32323",
  "url": "https://patchblox.com/security/cve/CVE-2023-32323",
  "summary": "CVE-2023-32323 is fixed in matrix-synapse on 1 platform by DEBIAN-CVE-2023-32323 (version 1.74.0-1), released May 26, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "matrix-synapse: Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation",
  "description": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of \u0060invite_room_state\u0060, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized \u0060invite_room_state\u0060 fields. Server operators should upgrade to Synapse 1.74 or newer urgently.",
  "published": "2023-05-26T14:15:10Z",
  "severity": "medium",
  "cvss": 4.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
  "epss": 0.00981,
  "epssPercentile": 0.62499,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Debian 14",
      "fixedVersion": "1.74.0-1",
      "fix": "DEBIAN-CVE-2023-32323",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-32323",
      "released": "2023-05-26T14:15:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}