OAuth2 client_secret stored in plain text in the Nextcloud database

{
  "id": "87be1d691599d11ade490005f9140f5927f21b44162ce3bb8f6cba0200300ff1",
  "url": "https://osv.dev/vulnerability/CVE-2023-45151",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OAuth2 client_secret stored in plain text in the Nextcloud database",
    "summary": "Nextcloud server is an open source home cloud platform. Affected versions of Nextcloud stored OAuth2 tokens in plaintext which allows an attacker who has gained access to the server to potentially elevate their privilege. This issue has been addressed and users are recommended to upgrade their Nextcloud Server to version 25.0.8, 26.0.3 or 27.0.1. There are no known workarounds for this vulnerability.",
    "evidence": "osv:CVE-2023-45151",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-45151",
      "aliases": [
        "CVE-2023-45151",
        "GHSA-hhgv-jcg9-p4m9"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "20ea9a25353129b56d46951fe7d23939665ab2b2"
                },
                {
                  "fixed": "82f744bb016b059a55d1c6c476a665029e55cedc"
                },
                {
                  "introduced": "62cfd3b4c9ff4d8cdbbe6dcc8b63a1085bb94e3d"
                },
                {
                  "fixed": "5348e530ea6c61e443cf4f5cab7f4ed97ddd14d3"
                },
                {
                  "introduced": "add4e4365a4040d2e4e6aa79c0d03c3edd78583c"
                },
                {
                  "last_affected": "add4e4365a4040d2e4e6aa79c0d03c3edd78583c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "25.0.0"
                      },
                      {
                        "fixed": "25.0.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "25.0.0"
                      },
                      {
                        "fixed": "25.0.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "26.0.0"
                      },
                      {
                        "fixed": "26.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "26.0.0"
                      },
                      {
                        "fixed": "26.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "27.0.0"
                      },
                      {
                        "last_affected": "27.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "27.0.0"
                      },
                      {
                        "last_affected": "27.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "27.0.0",
            "v25.0.8rc2",
            "v26.0.3rc2",
            "v25.0.8rc1",
            "v26.0.3rc1",
            "v27.0.0",
            "v25.0.7",
            "v26.0.2",
            "v25.0.7rc1",
            "v26.0.2rc1",
            "v25.0.6",
            "v26.0.1",
            "v25.0.6rc1",
            "v26.0.1rc1",
            "v25.0.5",
            "v26.0.0",
            "v25.0.5rc1",
            "v25.0.4",
            "v25.0.4rc1",
            "v25.0.3",
            "v25.0.3rc2",
            "v25.0.3rc1",
            "v25.0.2",
            "v25.0.2rc3",
            "v25.0.2rc2",
            "v25.0.2rc1",
            "v25.0.1",
            "v25.0.1rc1",
            "v25.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-45151.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.270097165Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/1994324",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45151.json",
        "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-45151",
        "https://github.com/nextcloud/server/pull/38398"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-312"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45151.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-45151",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 501330,
  "published_at": "2023-10-16T18:41:28.713+00:00"
}