Skip to content
OpenAdvisories
Low · 3.5 CVE-2023-39959 EUVD-2023-43656

Existence of calendars and address books can be checked by unauthenticated users

Published Aug 10, 2023 · Updated Oct 8, 2024 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
nextcloud security-advisories >= 25.0.0, < 25.0.9, >= 26.0.0, < 26.0.4, >= 27.0.0, < 27.0.1 —

Advisories 1

References