CVE-2023-28997

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-323

Affected software

Vendor	Product	Versions
nextcloud	security-advisories	>= 3.0.0, < 3.6.5

References

https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdfExploit, Technical Description, Third Party Advisory
https://github.com/nextcloud/desktop/pull/5324Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fcVendor Advisory
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdfExploit, Technical Description, Third Party Advisory
https://github.com/nextcloud/desktop/pull/5324Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fcVendor Advisory
https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html

Timeline

Published: Apr 4, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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