{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2023-48239",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2023-11-13T13:25:18.482Z",
        "datePublished": "2023-11-21T21:02:35.442Z",
        "dateUpdated": "2025-06-10T13:59:10.422Z"
    },
    "containers": {
        "cna": {
            "title": "Nextcloud Server users can make external storage mount points inaccessible for other users",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-284",
                            "lang": "en",
                            "description": "CWE-284: Improper Access Control",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hw26-g267",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hw26-g267"
                },
                {
                    "name": "https://github.com/nextcloud/server/pull/41123",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nextcloud/server/pull/41123"
                },
                {
                    "name": "https://hackerone.com/reports/2212627",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://hackerone.com/reports/2212627"
                }
            ],
            "affected": [
                {
                    "vendor": "nextcloud",
                    "product": "security-advisories",
                    "versions": [
                        {
                            "version": ">= 25.0.0, < 25.0.13",
                            "status": "affected"
                        },
                        {
                            "version": ">= 26.0.0, < 26.0.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 27.0.0, < 27.1.3",
                            "status": "affected"
                        },
                        {
                            "version": ">= 20.0.0, < 20.0.14.16",
                            "status": "affected"
                        },
                        {
                            "version": ">= 21.0.0, < 21.0.9.13",
                            "status": "affected"
                        },
                        {
                            "version": ">= 22.0.0, < 22.2.10.15",
                            "status": "affected"
                        },
                        {
                            "version": ">= 23.0.0, < 23.0.12.12",
                            "status": "affected"
                        },
                        {
                            "version": ">= 24.0.0, < 24.0.12.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2023-11-21T21:02:35.442Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and starting in version 20.0.0 and prior to versions 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Enterprise Server, a malicious user could update any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud Server 25.0.13, 26.0.8, and 27.1.3 and Nextcloud Enterprise Server is upgraded to 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 contain a patch for this issue. As a workaround, disable app files_external. This workaround also makes the external storage inaccessible but retains the configurations until a patched version has been deployed."
                }
            ],
            "source": {
                "advisory": "GHSA-f962-hw26-g267",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T21:23:39.082Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hw26-g267",
                        "tags": [
                            "x_refsource_CONFIRM",
                            "x_transferred"
                        ],
                        "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-f962-hw26-g267"
                    },
                    {
                        "name": "https://github.com/nextcloud/server/pull/41123",
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://github.com/nextcloud/server/pull/41123"
                    },
                    {
                        "name": "https://hackerone.com/reports/2212627",
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://hackerone.com/reports/2212627"
                    }
                ]
            },
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-06-10T13:58:55.979066Z",
                                "id": "CVE-2023-48239",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-06-10T13:59:10.422Z"
                }
            }
        ]
    }
}