{
  "cveId": "CVE-2021-4020",
  "url": "https://patchblox.com/security/cve/CVE-2021-4020",
  "summary": "CVE-2021-4020 is fixed in janus on 1 platform, first by DEBIAN-CVE-2021-4020, released November 27, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "janus: janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
  "description": "janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
  "published": "2021-11-27T10:15:07Z",
  "severity": "medium",
  "cvss": 5.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
  "epss": 0.00845,
  "epssPercentile": 0.58264,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "janus",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "0.11.5-4",
      "fix": "DEBIAN-CVE-2021-4020",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4020",
      "released": "2021-11-27T10:15:07Z"
    },
    {
      "platform": "linux",
      "product": "janus",
      "release": "Debian 14",
      "fixedVersion": "0.11.5-4",
      "fix": "DEBIAN-CVE-2021-4020",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4020",
      "released": "2021-11-27T10:15:07Z"
    }
  ],
  "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"
  }
}