title: Users can set up workflows using restricted and invisible system tags in Nextcloud
description: Nextcloud is a personal home server system. Depending on the set up tags and other workflows this issue can be used to limit access of others or being able to grant them access when there are system tag based files access control or files retention rules. It is recommended that the Nextcloud Server is upgraded to 24.0.11 or 25.0.5, the Nextcloud Enterprise Server to 21.0.9.11, 22.2.10.11, 23.0.12.6, 24.0.11 or 25.0.5, and the Nextcloud Files automated tagging app to 1.11.1, 1.12.1, 1.13.1, 1.14.2, 1.15.3 or 1.16.1. Users unable to upgrade should disable all workflow related apps. Users are advised to upgrade.
problem types: CWE-284: Improper Access Control
affected:
{
vendor: nextcloud
product: security-advisories
versions:
version: Nextcloud Server: < 24.0.11, status: affected
version: Nextcloud Server: >= 25.0.0, < 25.0.5, status: affected
version: Nextcloud Files automated tagging: >= 1.11.0, < 1.11.1, status: affected
version: Nextcloud Files automated tagging: >= 1.12.0, < 1.12.1, status: affected
version: Nextcloud Files automated tagging: >= 1.13.0, < 1.13.1, status: affected
version: Nextcloud Files automated tagging: >= 1.14.0, < 1.14.2, status: affected
version: Nextcloud Files automated tagging: >= 1.15.0, < 1.15.3, status: affected
version: Nextcloud Files automated tagging: >= 1.16.0, < 1.16.1, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: LOW
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
version: 3.1
]