Vulnerability in Nextcloud Server
CVE-2023-39959
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.9, 26.0.4, and 27.0.1, unauthenticated users could send a DAV request which reveals whether a calendar or an address book with the given identifier exists for the victim. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.
EPSS: 0.005 (39.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Nextcloud Nextcloud_server — versions 27.0.0
- Nextcloud Security-advisories — versions >= 25.0.0, < 25.0.9, >= 26.0.0, < 26.0.4, >= 27.0.0, < 27.0.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Permissions Required, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-39959?
- CVE-2023-39959 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-2023-39959?
- Low severity. CVSS v3 base score is 3.5 out of 10.