FKIE_CVE-2023-48228

Vulnerability from fkie_nvd - Published: 2023-11-21 21:15 - Updated: 2026-06-17 06:33
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
authentik is an open-source identity provider. When initialising a oauth2 flow with a `code_challenge` and `code_method` (thus requesting PKCE), the single sign-on provider (authentik) must check if there is a matching and existing `code_verifier` during the token step. Prior to versions 2023.10.4 and 2023.8.5, authentik checks if the contents of `code_verifier` is matching only when it is provided. When it is left out completely, authentik simply accepts the token request with out it; even when the flow was started with a `code_challenge`. authentik 2023.8.5 and 2023.10.4 fix this issue.
References
security-advisories@github.comhttps://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225Product
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/7666Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/7668Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/pull/7669Patch
security-advisories@github.comhttps://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4Release Notes
security-advisories@github.comhttps://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5Release Notes
security-advisories@github.comhttps://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3Exploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225Product
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/pull/7666Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/pull/7668Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/pull/7669Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4Release Notes
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5Release Notes
af854a3a-2127-422b-91ae-364da2661108https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3Exploit, Vendor Advisory
Impacted products
Vendor Product Version
goauthentik authentik *
goauthentik authentik *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "authentik",
          "vendor": "goauthentik",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2023.10.4"
            },
            {
              "status": "affected",
              "version": "\u003c 2023.8.5"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EDAD4E86-B0E7-4863-B8B4-D3B85DF1F9B3",
              "versionEndExcluding": "2023.8.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "94DFCEE9-DE60-4890-8F11-D2EFDB0565D5",
              "versionEndExcluding": "2023.10.4",
              "versionStartIncluding": "2023.10.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "authentik is an open-source identity provider. When initialising a oauth2 flow with a `code_challenge` and `code_method` (thus requesting PKCE), the single sign-on provider (authentik) must check if there is a matching and existing `code_verifier` during the token step. Prior to versions 2023.10.4 and 2023.8.5, authentik checks if the contents of `code_verifier` is matching only when it is provided. When it is left out completely, authentik simply accepts the token request with out it; even when the flow was started with a `code_challenge`. authentik 2023.8.5 and 2023.10.4 fix this issue."
    },
    {
      "lang": "es",
      "value": "authentik es un proveedor de identidad de c\u00f3digo abierto. Al inicializar un flujo oauth2 con un `code_challenge` y un `code_method` (solicitando as\u00ed PKCE), el proveedor de inicio de sesi\u00f3n \u00fanico (authentik) debe verificar si hay un `code_verifier` coincidente y existente durante el paso del token. Antes de las versiones 2023.10.4 y 2023.8.5, authentik verifica si el contenido de `code_verifier` coincide solo cuando se proporciona. Cuando se omite por completo, authentik simplemente acepta la solicitud del token sin \u00e9l; incluso cuando el flujo se inici\u00f3 con un \"code_challenge\". authentik 2023.8.5 y 2023.10.4 solucionan este problema."
    }
  ],
  "id": "CVE-2023-48228",
  "lastModified": "2026-06-17T06:33:47.157",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-11-21T21:15:08.477",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/pull/7666"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/pull/7668"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/goauthentik/authentik/pull/7669"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/goauthentik/authentik/pull/7666"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/goauthentik/authentik/pull/7668"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/goauthentik/authentik/pull/7669"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5"
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      "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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