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OpenAdvisories
Medium DLA-4303-1 5 CVEs

nextcloud-desktop - security update

Published Sep 18, 2025 · Updated Mar 9, 2026

Fixed packages 1

ReleasePackageFixed in
Debian · 11 nextcloud-desktop 3.1.1-2+deb11u2

Vulnerabilities 5

  • Medium 6.7

    Nextcloud Desktop: Initialization vector reuse in E2EE allows malicious server admin to break, manipulate, access files

    The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade…

  • Medium 4.6

    Cross-site Scripting (XSS) in Nexcloud Desktop Client

    Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application in the notifications. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1. There are…

  • Medium 4.6

    Cross-site scripting (XSS) in Nextcloud Desktop Client

    Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application via user status and information. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1…

  • Medium 4.6

    Cross-site scripting (XSS) in Nextcloud Desktop Client

    Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1. There are no known workarounds…

  • Low 3.9

    nextcloudcmd incorrectly trusts bad TLS certificates

    Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack …