Vulnerability in Nextcloud Desktop
CVE-2023-28998
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Nextcloud Desktop
- Nextcloud Security-Advisories — versions >= 3.0.0, < 3.6.5
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-jh3g-wpwv-cqgr (Vendor Advisory)
- github.com/nextcloud/desktop/pull/5323 (Patch, Vendor Advisory)
- ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/educat… (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-28998?
- CVE-2023-28998 is a medium-severity vulnerability in Nextcloud Desktop, classified under Missing Cryptographic Step. CVSS score: 6.7/10. Published 2023-04-04.
- How severe is CVE-2023-28998?
- Medium severity. CVSS v3 base score is 6.7 out of 10.