{
  "cveId": "CVE-2025-61669",
  "url": "https://patchblox.com/security/cve/CVE-2025-61669",
  "summary": "CVE-2025-61669 is fixed in jupyter-server on 1 platform by DEBIAN-CVE-2025-61669 (version 2.20.0-1), released May 5, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "jupyter-server: Jupyter Server is the backend for Jupyter web applications",
  "description": "Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in \u0060LoginFormHandler._redirect_safe()\u0060, which allows redirects to arbitrary external domains via values such as \u0060///example.com\u0060. An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.0.",
  "published": "2026-05-05T16:16:10Z",
  "severity": "medium",
  "cvss": 6.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
  "epss": 0.00244,
  "epssPercentile": 0.15669,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "jupyter-server",
      "release": "Debian 14",
      "fixedVersion": "2.20.0-1",
      "fix": "DEBIAN-CVE-2025-61669",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-61669",
      "released": "2026-05-05T16:16:10Z"
    }
  ],
  "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"
  }
}