CVE-2023-39961

LOW

Nextcloud Server 24.0.4-24.0.12.4, 25.0.0-25.0.8, 26.0.0-26.0.3, 27.0.0 - Improper Access Control

Title source: llm
STIX 2.1

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1, when a folder with images or an image was shared without download permissions, the user could add the image inline into a text file and download it. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 24.0.12.5, 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
Permissions Required x_refsource_misc
https://hackerone.com/reports/1965156

Scores

CVSS v3 3.5
EPSS 0.0032
EPSS Percentile 54.7%
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