Authorization bypass through user-controlled key in Nextcloud Enterprise Server and Nextcloud Server - CVE-2023-48304
Published: November 21, 2023
Vulnerability identifier: #VU83361
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-48304
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the authorization bypass through user-controlled key. A remote user can enable and disable the birthday calendar for any user on the same server.
Affected software
Nextcloud Enterprise Server
Nextcloud Server
Nextcloud Server
How to mitigate CVE-2023-48304
Install updates from vendor's website.
Nextcloud Enterprise Server - addressed in versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, 27.1.0
Nextcloud Server - addressed in versions 25.0.11, 26.0.6, 27.1.0
Nextcloud Server - addressed in versions 25.0.11, 26.0.6, 27.1.0