CVE-2023-39959

LOW

Nextcloud Server 25.0.0-25.0.8 - Unauthenticated Information Disclosure via DAV Request

Title source: llm

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. No known workarounds are available.

References (3)

Core 3

Core References

Vendor Advisory x_refsource_confirm

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpj

Patch x_refsource_misc

https://github.com/nextcloud/server/pull/38747

Permissions Required x_refsource_misc

https://hackerone.com/reports/1832126

Scores

CVSS v3 3.5

EPSS 0.0082

EPSS Percentile 74.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (2)

nextcloud/nextcloud_server 27.0.0 (2 CPE variants)

nextcloud/nextcloud_server 25.0.0 - 25.0.9 (2 CPE variants)

Published Aug 10, 2023

Tracked Since Feb 18, 2026