CVE-2023-48308: Nextcloud Calendar

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Nextcloud/Cloud is a calendar app for Nextcloud. An attacker can gain access to stacktrace and internal paths of the server when generating an exception while editing a calendar appointment. It is recommended that the Nextcloud Calendar app is upgraded to 4.5.3

Affected products

• Nextcloud Calendar: from 3.0.0, before 4.5.3 (fixed in 4.5.3)

Published 2023-12-22. Last modified 2026-06-17.