CVE-2021-41233: Nextcloud Server

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful exploitation an attacker requires knowledge of the sharing link. It is recommended that users upgrade their Nextcloud Server to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the Nextcloud Text application in the application settings.

Affected products

• Nextcloud Nextcloud Server: before 20.0.14 (fixed in 20.0.14); from 21.0.0, before 21.0.6 (fixed in 21.0.6); from 22.2.0, before 22.2.1 (fixed in 22.2.1)

Published 2022-03-10. Last modified 2026-06-17.