CVE-2023-39959

CWE-284 — Improper Access Control2 documents2 sources

Severity

5.3MEDIUM

EPSS

0.7%

top 28.91%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Nextcloud Nextcloud Server Nextcloud Security-advisories

Timeline

PublishedAug 10

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:NExploitability: 2.1 | Impact: 1.4

Affected Packages2 packages

▶NVDnextcloud/nextcloud_server25.0.0 — 25.0.9+2

▶CVEListV5nextcloud/security-advisories>= 25.0.0, < 25.0.9, >= 26.0.0, < 26.0.4, >= 27.0.0, < 27.0.1+2

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

CVEList

Existence of calendars and address books can be checked by unauthenticated users↗2023-08-10

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