{
  "cveId": "CVE-2023-32683",
  "url": "https://patchblox.com/security/cve/CVE-2023-32683",
  "summary": "CVE-2023-32683 is fixed in matrix-synapse on 1 platform, first by DEBIAN-CVE-2023-32683, released June 6, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "matrix-synapse: Synapse is a Matrix protocol homeserver written in Python with the Twisted framework",
  "description": "Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the \u0060url_preview_url_blacklist\u0060 setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the \u0060url_preview_ip_range_blacklist\u0060 setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the \u0060url_preview_enabled\u0060 setting) or have not configured a \u0060url_preview_url_blacklist\u0060 are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.",
  "published": "2023-06-06T12:15:00Z",
  "severity": "medium",
  "cvss": 5.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
  "epss": 0.00605,
  "epssPercentile": 0.49197,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Debian 14",
      "fixedVersion": "1.90.0-1",
      "fix": "DEBIAN-CVE-2023-32683",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-32683",
      "released": "2023-06-06T19:15:11Z"
    },
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.24.0\u002Bdfsg-1ubuntu0.1~esm4",
      "fix": "matrix-synapse 0.24.0\u002Bdfsg-1ubuntu0.1~esm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-matrix-synapse-0.24.0-dfsg-1ubuntu0.1-esm4",
      "released": "2023-10-31T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.11.0-1ubuntu0.1~esm2",
      "fix": "matrix-synapse 1.11.0-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-matrix-synapse-1.11.0-1ubuntu0.1-esm2",
      "released": "2023-10-31T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "matrix-synapse",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.53.0-1ubuntu0.1~esm2",
      "fix": "matrix-synapse 1.53.0-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-matrix-synapse-1.53.0-1ubuntu0.1-esm2",
      "released": "2024-12-03T09:15:00Z"
    }
  ],
  "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"
  }
}