Vulnerability in Nextcloud Server
CVE-2023-25821
Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround is available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Nextcloud Server — versions 25.0.0
- Nextcloud Security-Advisories — versions >= 24.0.4, < 24.0.7, >= 25.0.0, < 25.0.1
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-7w6h-5qgw-4j94 (Vendor Advisory)
- github.com/nextcloud/server/pull/34502 (Patch)
- hackerone.com/reports/1724016 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-25821?
- CVE-2023-25821 is a medium-severity vulnerability in Nextcloud Server, classified under Improper Access Control. CVSS score: 5.7/10. Published 2023-02-25.
- How severe is CVE-2023-25821?
- Medium severity. CVSS v3 base score is 5.7 out of 10.