Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, missing protection allows an attacker to brute force the client secrets of configured OAuth2 clients. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 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
Vendor Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vv27-g2hq-v48h
Patch, Vendor Advisory x_refsource_misc
https://github.com/nextcloud/server/pull/38773
Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1258448
Scores
CVSS v3
5.8
EPSS
0.0044
EPSS Percentile
63.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-307
Status
published
Products (3)
nextcloud/nextcloud_server
27.0.0 (2 CPE variants)
nextcloud/nextcloud_server
22.0.0 - 22.2.10.14
nextcloud/nextcloud_server
25.0.0 - 25.0.9
Published
Aug 10, 2023
Tracked Since
Feb 18, 2026