{
  "cveId": "CVE-2024-53867",
  "url": "https://patchblox.com/security/cve/CVE-2024-53867",
  "summary": "CVE-2024-53867 is fixed in matrix-synapse on 1 platform by DEBIAN-CVE-2024-53867 (version 1.121.0-1), released December 3, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "matrix-synapse: Synapse is an open-source Matrix homeserver",
  "description": "Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1.",
  "published": "2024-12-03T17:15:12Z",
  "severity": "medium",
  "cvss": 4.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
  "epss": 0.00442,
  "epssPercentile": 0.38686,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Debian 14",
      "fixedVersion": "1.121.0-1",
      "fix": "DEBIAN-CVE-2024-53867",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-53867",
      "released": "2024-12-03T17:15:12Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}