CVE-2023-28997 | BDVDB-2026-199208 Detail
nextcloudsecurity-advisories
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 recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact none. Attack vector: physical.
Weaknesses#
- CWE-323 Reusing a Nonce, Key Pair in Encryption
References#
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc
- https://github.com/nextcloud/desktop/pull/5324
- https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
- https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.