Vulnerability in Nextcloud Desktop
CVE-2023-28999
Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, 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. This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.007 (51.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% 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
- Nextcloud Security-Advisories — versions >= 3.0.0, < 3.8.0, >= 3.13.0, < 3.25.0, >= 3.0.5, < 4.8.0
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wxww-3rr8 (Vendor Advisory)
- github.com/nextcloud/desktop/pull/5560 (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-2023-28999?
- CVE-2023-28999 is a medium-severity vulnerability in Nextcloud Desktop, classified under Missing Cryptographic Step. CVSS score: 6.9/10. Published 2023-04-04.
- How severe is CVE-2023-28999?
- Medium severity. CVSS v3 base score is 6.9 out of 10.