What is CVE-2023-48304?

CVE-2023-48304 is a vulnerability in Nextcloud Server that allows an attacker to enable or disable the birthday calendar for any user.

What software is affected by CVE-2023-48304?

Nextcloud Server versions prior to 25.0.11, 26.0.6, and 27.1.0 are affected by CVE-2023-48304.

What is the severity of CVE-2023-48304?

CVE-2023-48304 has a severity rating of 4.3.

How can I mitigate CVE-2023-48304?

To mitigate CVE-2023-48304, update your Nextcloud Server to version 25.0.11, 26.0.6, or 27.1.0.

Where can I find more information about CVE-2023-48304?

You can find more information about CVE-2023-48304 on the Nextcloud security advisories page, the Nextcloud GitHub repository, and the HackerOne report linked in the references.

Vulnerability/
CVE-2023-48304

medium

4.3

CWE

639

21/11/2023

1/12/2023

CVE-2023-48304: Nextcloud Server vulnerable to attacker enabling/disabling birthday calendar for any user

First published: Tue Nov 21 2023(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud Nextcloud Server	>=22.0.0<=22.2.10.16
Nextcloud Nextcloud Server	>=23.0.0<23.0.12.11
Nextcloud Nextcloud Server	>=24.0.0<24.0.12.7
Nextcloud Nextcloud Server	>=25.0.0<25.0.11
Nextcloud Nextcloud Server	>=25.0.0<25.0.11
Nextcloud Nextcloud Server	>=26.0.0<26.0.6
Nextcloud Nextcloud Server	>=26.0.0<26.0.6
Nextcloud Nextcloud Server	>=27.0.0<27.1.0
Nextcloud Nextcloud Server	>=27.0.0<27.1.0

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Frequently Asked Questions

What is CVE-2023-48304?
CVE-2023-48304 is a vulnerability in Nextcloud Server that allows an attacker to enable or disable the birthday calendar for any user.
What software is affected by CVE-2023-48304?
Nextcloud Server versions prior to 25.0.11, 26.0.6, and 27.1.0 are affected by CVE-2023-48304.
What is the severity of CVE-2023-48304?
CVE-2023-48304 has a severity rating of 4.3.
How can I mitigate CVE-2023-48304?
To mitigate CVE-2023-48304, update your Nextcloud Server to version 25.0.11, 26.0.6, or 27.1.0.
Where can I find more information about CVE-2023-48304?
You can find more information about CVE-2023-48304 on the Nextcloud security advisories page, the Nextcloud GitHub repository, and the HackerOne report linked in the references.

collector/mitre-cve
collector/nvd-api
vendor/nextcloud
canonical/nextcloud nextcloud server
version/nextcloud nextcloud server/22.0.0
version/nextcloud nextcloud server/22.2.10.16
version/nextcloud nextcloud server/23.0.0
version/nextcloud nextcloud server/24.0.0
version/nextcloud nextcloud server/25.0.0
version/nextcloud nextcloud server/26.0.0
version/nextcloud nextcloud server/27.0.0

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