{
  "cveId": "CVE-2023-3550",
  "url": "https://patchblox.com/security/cve/CVE-2023-3550",
  "summary": "CVE-2023-3550 is fixed in mediawiki on 1 platform, first by DEBIAN-CVE-2023-3550, released September 25, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "mediawiki: Mediawiki v1.40.0 does not validate namespaces used in XML files",
  "description": "Mediawiki v1.40.0 does not validate namespaces used in XML files.  Therefore, if the instance administrator allows XML file uploads,  a remote attacker with a low-privileged user account can use this  exploit to become an administrator by sending a malicious link to  the instance administrator.",
  "published": "2023-09-25T16:15:14Z",
  "severity": "high",
  "cvss": 7.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
  "epss": 0.0138,
  "epssPercentile": 0.7228,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mediawiki",
      "release": "Debian 11.6 (bullseye)",
      "fixedVersion": "1:1.35.13-1~deb11u1",
      "fix": "DSA-5520-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-5520-1",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mediawiki",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:1.39.5-1~deb12u1",
      "fix": "DSA-5520-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-5520-1",
      "released": "2023-10-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mediawiki",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:1.39.5-1",
      "fix": "DEBIAN-CVE-2023-3550",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-3550",
      "released": "2023-09-25T16:15:14Z"
    },
    {
      "platform": "linux",
      "product": "mediawiki",
      "release": "Debian 14",
      "fixedVersion": "1:1.39.5-1",
      "fix": "DEBIAN-CVE-2023-3550",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-3550",
      "released": "2023-09-25T16:15:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}