CVE-2023-48304

low-risk
Published 2023-11-21

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.

Do I need to act?

-
0.14% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Nextcloud

References (6)

Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8jwv-c...
Issue Tracking https://github.com/nextcloud/server/pull/40292
Exploit https://hackerone.com/reports/2112973
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8jwv-c...
Issue Tracking https://github.com/nextcloud/server/pull/40292
Exploit https://hackerone.com/reports/2112973
26
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 7/34 · Low