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The vulnerability stems from incorrect path handling within Nextcloud’s groupfolders feature. Groupfolders, which are shared directories for teams, use a different internal path structure compared to regular user folders. When a user performs an action, such as uploading or deleting a file within a groupfolder, the system must log this event in the admin_audit log. However, a bug in the logging function fails to properly translate the file’s path from the groupfolder’s internal format to a path the audit system can recognize and record. This mismatch causes the logging function to skip creating an audit entry for the action. Consequently, while the file operation itself succeeds, no record of it appears in the administrative audit trail, creating a gap in security monitoring.
Platform: Nextcloud Server
Version: Prior to 30.0.9
Vulnerability : Insufficient Logging
Severity: Medium
date: 12/05/2025
Prediction: 12/05/2025
What Undercode Say:
Bash Commands and Codes:
Check current Nextcloud version sudo -u www-data php occ config:system:get version Update Nextcloud via updater or package manager sudo -u www-data php updater/updater.phar Check admin_audit app logs grep "groupfolders" /var/www/nextcloud/data/nextcloud.log
How Exploit:
Actions performed by users, such as file uploads, modifications, or deletions within a shared groupfolder, are not recorded in the administrative audit log. This allows activities to occur without generating an audit trail.
Protection from this CVE
Upgrade Nextcloud Server to version 30.0.9 or 31.0.1. Apply the latest maintenance updates for your version series.
Impact:
Creates gaps in audit trails. Hinders detection of unauthorized actions. Impacts forensic investigations and compliance.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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