CVE-2023-28998
MEDIUMNextcloud Desktop Client <3.6.5 - Privilege Escalation
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr
Patch, Vendor Advisory x_refsource_misc
https://github.com/nextcloud/desktop/pull/5323
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf
Scores
CVSS v3
6.7
EPSS
0.0079
EPSS Percentile
74.1%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-325
Status
published
Products (1)
nextcloud/desktop
3.0.0 - 3.6.5
Published
Apr 04, 2023
Tracked Since
Feb 18, 2026