CVE-2023-28997

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.

Score

CVSS 3.1 6.7 Medium

Status

Modified - security-advisories@github.com

Published

2023-04-04

Last modified

2025-11-03

Weaknesses

CWE-323

Affected products

• Desktop (Nextcloud)
• Security-advisories (Nextcloud)

References

• https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola…
• https://github.com/nextcloud/desktop/pull/5324
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc
• https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html