Vulnerability in Nextcloud Desktop
CVE-2022-39334
Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack that exposes sensitive data or credentials to a network attacker. This affects the CLI only. It does not affect the standard GUI desktop Nextcloud clients, and it does not affect the Nextcloud server.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Nextcloud Desktop
- Nextcloud Security-Advisories — versions < 3.6.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-82xx-98xv-4jxv (Third Party Advisory)
- github.com/nextcloud/desktop/issues/4927 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/nextcloud/desktop/pull/5022 (Patch, Third Party Advisory)
- hackerone.com/reports/1699740 (Permissions Required, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-39334?
- CVE-2022-39334 is a low-severity vulnerability in Nextcloud Desktop, classified under Improper Certificate Validation. CVSS score: 3.9/10. Published 2022-11-25.
- How severe is CVE-2022-39334?
- Low severity. CVSS v3 base score is 3.9 out of 10.
- Is CVE-2022-39334 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.