GET

Package Instance

Lookup for vulnerable packages by Package URL.

GET /api/packages/67413?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "http://public2.vulnerablecode.io/api/packages/67413?format=api",
    "purl": "pkg:pypi/jupyterhub-firstuseauthenticator@0.9",
    "type": "pypi",
    "namespace": "",
    "name": "jupyterhub-firstuseauthenticator",
    "version": "0.9",
    "qualifiers": {},
    "subpath": "",
    "is_vulnerable": true,
    "next_non_vulnerable_version": "1.0.0",
    "latest_non_vulnerable_version": "1.0.0",
    "affected_by_vulnerabilities": [
        {
            "url": "http://public2.vulnerablecode.io/api/vulnerabilities/218217?format=api",
            "vulnerability_id": "VCID-g7q5-w5q2-t7fh",
            "summary": "FirstUseAuthenticator is a JupyterHub authenticator that helps new users set their password on their first login to JupyterHub. When JupyterHub is used with FirstUseAuthenticator, a vulnerability in versions prior to 1.0.0 allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed. One may upgrade to version 1.0.0 or apply a patch manually to mitigate the vulnerability. For those who cannot upgrade, there is no complete workaround, but a partial mitigation exists. One can disable user creation with `c.FirstUseAuthenticator.create_users = False`, which will only allow login with fully normalized usernames for already existing users prior to jupyterhub-firstuserauthenticator 1.0.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until a patch or upgrade occurs.",
            "references": [
                {
                    "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-41194",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "0.00352",
                            "scoring_system": "epss",
                            "scoring_elements": "0.58014",
                            "published_at": "2026-06-11T12:55:00Z"
                        },
                        {
                            "value": "0.00352",
                            "scoring_system": "epss",
                            "scoring_elements": "0.58127",
                            "published_at": "2026-06-12T12:55:00Z"
                        }
                    ],
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-41194"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/commit/953418e2450dbc2d854e332350849533b0ebc7ba",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/commit/953418e2450dbc2d854e332350849533b0ebc7ba"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/32b21898fb2b53b1a2e36270de6854ad70e9e9bf",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/32b21898fb2b53b1a2e36270de6854ad70e9e9bf"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/9e200d974e0cb85d828a6afedb8ab90a37878f28",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/9e200d974e0cb85d828a6afedb8ab90a37878f28"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch"
                },
                {
                    "reference_url": "https://github.com/jupyterhub/firstuseauthenticator/security/advisories/GHSA-5xvc-vgmp-jgc3",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "cvssv3.1_qr",
                            "scoring_elements": ""
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/jupyterhub/firstuseauthenticator/security/advisories/GHSA-5xvc-vgmp-jgc3"
                },
                {
                    "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-firstuseauthenticator/PYSEC-2021-384.yaml",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-firstuseauthenticator/PYSEC-2021-384.yaml"
                },
                {
                    "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41194",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "9.1",
                            "scoring_system": "cvssv3.1",
                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
                        },
                        {
                            "value": "9.3",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
                        },
                        {
                            "value": "CRITICAL",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41194"
                },
                {
                    "reference_url": "https://github.com/advisories/GHSA-5xvc-vgmp-jgc3",
                    "reference_id": "GHSA-5xvc-vgmp-jgc3",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "CRITICAL",
                            "scoring_system": "cvssv3.1_qr",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/advisories/GHSA-5xvc-vgmp-jgc3"
                }
            ],
            "fixed_packages": [
                {
                    "url": "http://public2.vulnerablecode.io/api/packages/67420?format=api",
                    "purl": "pkg:pypi/jupyterhub-firstuseauthenticator@1.0.0",
                    "is_vulnerable": false,
                    "affected_by_vulnerabilities": [],
                    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/jupyterhub-firstuseauthenticator@1.0.0"
                }
            ],
            "aliases": [
                "CVE-2021-41194",
                "GHSA-5xvc-vgmp-jgc3",
                "PYSEC-2021-384"
            ],
            "risk_score": 4.5,
            "exploitability": "0.5",
            "weighted_severity": "9.0",
            "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-g7q5-w5q2-t7fh"
        }
    ],
    "fixing_vulnerabilities": [],
    "risk_score": "4.5",
    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/jupyterhub-firstuseauthenticator@0.9"
}