Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, an attacker could enable and disable the birthday calendar for any user on the same server. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches 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-8jwv-c8c8-9fr3
Issue Tracking, Patch x_refsource_misc
https://github.com/nextcloud/server/pull/40292
Exploit, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/2112973
Scores
CVSS v3
4.3
EPSS
0.0014
EPSS Percentile
34.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-639
Status
published
Products (2)
nextcloud/nextcloud_server
22.0.0 - 22.2.10.16
nextcloud/nextcloud_server
25.0.0 - 25.0.11
Published
Nov 21, 2023
Tracked Since
Feb 18, 2026