Vulnerability in Nextcloud Server
CVE-2023-28847
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server 24.0.0 prior to 24.0.11 and 25.0.0 prior to 25.0.5; as well as Nextcloud Server Enterprise 23.0.0 prior to 23.0.12.6, 24.0.0 prior to 24.0.11, and 25.0.0 prior to 25.0.5; an attacker is not restricted in verifying passwords of share links so they can just start brute forcing the password. Nextcloud Server 24.0.11 and 25.0.5 and Nextcloud Enterprise Server 23.0.12.6, 24.0.11, and 25.0.5 contain a fix for this issue. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Nextcloud Server
- Nextcloud Security-Advisories — versions >= 23.0.0, < 23.0.12.6, >= 24.0.0, < 24.0.11, >= 25.0.0, < 25.0.5
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-r5wf-xj97-3w7w (Vendor Advisory)
- github.com/nextcloud/server/pull/35057 (Patch, Issue Tracking)
- hackerone.com/reports/1894653 (Exploit, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2023-28847?
- CVE-2023-28847 is a low-severity vulnerability in Nextcloud Server, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 3.1/10. Published 2023-04-25.
- How severe is CVE-2023-28847?
- Low severity. CVSS v3 base score is 3.1 out of 10.