GSD-2022-39338

Vulnerability from gsd - Updated: 2023-12-13 01:19
Details
user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser.
Aliases
Aliases
CVE-2022-39338
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{
  "GSD": {
    "alias": "CVE-2022-39338",
    "description": "user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser.",
    "id": "GSD-2022-39338"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2022-39338"
      ],
      "details": "user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser.",
      "id": "GSD-2022-39338",
      "modified": "2023-12-13T01:19:20.445051Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2022-39338",
        "STATE": "PUBLIC",
        "TITLE": "Stored cross site scripting (XSS) vulnerability via Authorization Endpoint in user_oidc"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "security-advisories",
                    "version": {
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                          "version_value": "\u003c 1.2.1"
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              "vendor_name": "nextcloud"
            }
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          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
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          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-20: Improper Input Validation"
              }
            ]
          },
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57",
            "refsource": "CONFIRM",
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57"
          },
          {
            "name": "https://github.com/nextcloud/user_oidc/pull/496",
            "refsource": "MISC",
            "url": "https://github.com/nextcloud/user_oidc/pull/496"
          },
          {
            "name": "https://hackerone.com/reports/1687410",
            "refsource": "MISC",
            "url": "https://hackerone.com/reports/1687410"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-5fpw-795h-rg57",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:nextcloud:openid_connect_user_backend:*:*:*:*:*:nextcloud:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.2.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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          "ID": "CVE-2022-39338"
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
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              "value": "user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser."
            }
          ]
        },
        "problemtype": {
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                  "value": "CWE-20"
                }
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57",
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              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57"
            },
            {
              "name": "https://github.com/nextcloud/user_oidc/pull/496",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/nextcloud/user_oidc/pull/496"
            },
            {
              "name": "https://hackerone.com/reports/1687410",
              "refsource": "MISC",
              "tags": [
                "Permissions Required",
                "Third Party Advisory"
              ],
              "url": "https://hackerone.com/reports/1687410"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.3,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2022-12-01T20:43Z",
      "publishedDate": "2022-11-25T19:15Z"
    }
  }
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.