Vulnerability in Nextcloud Server
CVE-2023-39961
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 24.0.4 and prior to versions 25.0.9, 26.0.4, and 27.0.1, when a folder with images or an image was shared without download permissions, the user could add the image inline into a text file and download it. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Nextcloud Server — versions 27.0.0
- Nextcloud Security-Advisories — versions >= 24.0.4, < 24.0.12.5, >= 25.0.0, < 25.0.9, >= 27.0.0, < 27.0.1
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-qhgm-w4gx-gvgp (Vendor Advisory)
- github.com/nextcloud/text/pull/4481 (Patch)
- hackerone.com/reports/1965156 (Permissions Required)
Frequently asked questions
- What is CVE-2023-39961?
- CVE-2023-39961 is a low-severity vulnerability in Nextcloud Server, classified under Improper Access Control. CVSS score: 3.5/10. Published 2023-08-10.
- How severe is CVE-2023-39961?
- Low severity. CVSS v3 base score is 3.5 out of 10.