CVE-2021-41166: Nextcloud

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.

Affected products

• Nextcloud Nextcloud: before 3.17.1 (fixed in 3.17.1)

Published 2022-01-26. Last modified 2026-06-17.