CVE-2023-48304

Nextcloud Server vulnerable to attacker enabling/disabling birthday calendar for any user

MEDIUM
4.3
CVSS Score
Published: November 21, 2023 at 10:06 PM UTC
Updated: June 17, 2026 at 06:33 AM UTC
1 product affected across 1 vendorNextcloud/server

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

22.0.0 ≤ v ≤ 22.2.10.1623.0.0 ≤ v < 23.0.12.1124.0.0 ≤ v < 24.0.12.725.0.0 ≤ v < 25.0.1126.0.0 ≤ v < 26.0.627.0.0 ≤ v < 27.1.0
Affected range stops below 23.0.12.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 24.0.12.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 25.0.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 26.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 27.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-639

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