Vulnerability-Lookup

JVNDB-2026-000080

Vulnerability from jvndb - Published: 2026-05-28 13:42 - Updated:2026-05-28 13:42

Severity

7.4 (High) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Summary

Jupyter Server vulnerable to open redirect

Details

Jupyter Server provided by Jupyter Development Team contains the vulnerability listed below.

Open redirect (CWE-601) - CVE-2025-61669

Noriaki Iwasaki of Cyber Defense Institute, Inc. reported this vulnerability to IPA and the developer. JPCERT/CC coordinated with the developer to publish the advisory under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN01719116/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2025-61669
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

Jupyter Development Team

Jupyter Server

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000080.html",
  "dc:date": "2026-05-28T13:42+09:00",
  "dcterms:issued": "2026-05-28T13:42+09:00",
  "dcterms:modified": "2026-05-28T13:42+09:00",
  "description": "Jupyter Server provided by Jupyter Development Team contains the vulnerability listed below.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/601.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eOpen redirect (CWE-601) - CVE-2025-61669\u003c/li\u003e\u003c/ul\u003eNoriaki Iwasaki of Cyber Defense Institute, Inc. reported this vulnerability to IPA and the developer.\r\nJPCERT/CC coordinated with the developer to publish the advisory under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000080.html",
  "sec:cpe": {
    "#text": "cpe:/a:misc:jupyter_development_team_jupyter_server",
    "@product": "Jupyter Server",
    "@vendor": "Jupyter Development Team",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "7.4",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000080",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN01719116/index.html",
      "@id": "JVN#01719116",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2025-61669",
      "@id": "CVE-2025-61669",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Jupyter Server vulnerable to open redirect"
}

CVE-2025-61669 (GCVE-0-2025-61669)

Vulnerability from cvelistv5 – Published: 2026-05-05 15:28 – Updated: 2026-05-05 20:16

Title

jupyter_server next parameter open redirect can redirect users to external domains

Summary

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 `LoginFormHandler._redirect_safe()`, which allows redirects to arbitrary external domains via values such as `///example.com`. 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.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/jupyter-server/jupyter_server/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
jupyter-server	jupyter_server	Affected: <= 2.17.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-61669",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T20:16:38.460105Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-05T20:16:59.332Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "jupyter_server",
          "vendor": "jupyter-server",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.17.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 `LoginFormHandler._redirect_safe()`, which allows redirects to arbitrary external domains via values such as `///example.com`. 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601: URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-05T15:28:43.833Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w"
        }
      ],
      "source": {
        "advisory": "GHSA-qh7q-6qm3-653w",
        "discovery": "UNKNOWN"
      },
      "title": "jupyter_server next parameter open redirect can redirect users to external domains"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-61669",
    "datePublished": "2026-05-05T15:28:43.833Z",
    "dateReserved": "2025-09-29T20:25:16.180Z",
    "dateUpdated": "2026-05-05T20:16:59.332Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

JVNDB-2026-000080

CVE-2025-61669 (GCVE-0-2025-61669)

Tags

Sightings

Nomenclature