CVE-2023-39959

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. No known workarounds are available.

• CWE-284

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpjVendor Advisory
• https://github.com/nextcloud/server/pull/38747Patch
• https://hackerone.com/reports/1832126Permissions Required
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpjVendor Advisory
• https://github.com/nextcloud/server/pull/38747Patch
• https://hackerone.com/reports/1832126Permissions Required

Published

Aug 10, 2023

Last Modified

Jun 17, 2026

Status

Modified

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