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 gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.
Use CWE-325, Nextcloud vendor hub and Desktop product page to widen CVE-2023-28998 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2024-46958, CVE-2023-28999 and CVE-2023-28997 for nearby disclosures in the same product family.