SSRF in Nextcloud Server
CVE-2023-48306
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.8% 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 >= 22.0.0, < 22.2.10.16, >= 23.0.0, < 23.0.12.11, >= 24.0.0, < 24.0.12.7
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v (Vendor Advisory)
- github.com/nextcloud/server/pull/40234 (Exploit, Patch, Issue Tracking)
- hackerone.com/reports/2115212 (Permissions Required)
Frequently asked questions
- What is CVE-2023-48306?
- CVE-2023-48306 is a medium-severity vulnerability in Nextcloud Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2023-11-21.
- How severe is CVE-2023-48306?
- Medium severity. CVSS v3 base score is 5.0 out of 10.