{"api_version":"1","generated_at":"2026-07-23T14:18:03+00:00","cve":"CVE-2023-39959","urls":{"html":"https://cve.report/CVE-2023-39959","api":"https://cve.report/api/cve/CVE-2023-39959.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-39959","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-39959"},"summary":{"title":"CVE-2023-39959","description":"Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.9, 26.0.4, and 27.0.1, unauthenticated users could send a DAV request which reveals whether a calendar or an address book with the given identifier exists for the victim. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. 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