Medium severity6.7NVD Advisory· Published Apr 4, 2023· Updated Jun 17, 2026
CVE-2023-28998
CVE-2023-28998
Description
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.
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Affected products
3- Range: >=3.0.0,<3.6.5
- Range: >= 3.0.0, < 3.6.5
Patches
Vulnerability mechanics
References
3- github.com/nextcloud/desktop/pull/5323nvdPatchVendor Advisory
- ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdfnvdExploitTechnical DescriptionThird Party Advisory
- github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgrnvdVendor Advisory
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