Auth bypass in Nextcloud Nextcloud_server
CVE-2025-47790
Nextcloud Server is a self hosted personal cloud system. Nextcloud Server prior to 29.0.15, 30.0.9, and 31.0.3 and Nextcloud Enterprise Server prior to 26.0.13.15, 27.1.11.15, 28.0.14.6, 29.0.15, 30.0.9, and 31.0.3 have a bug with session…
Vulnerability class: Broken Authentication
EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N.
Affected products
- Nextcloud Nextcloud_server
- Nextcloud Security-advisories — versions >= 26.0.0, < 26.0.13.15, >= 27.0.0, < 27.1.11.15, >= 28.0.0, < 28.0.14.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Permissions Required, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-47790?
- CVE-2025-47790 is a medium-severity vulnerability in Nextcloud Nextcloud_server, classified under Improper Authentication. CVSS score: 6.4/10. Published 2025-05-16.
- How severe is CVE-2025-47790?
- Medium severity. CVSS v3 base score is 6.4 out of 10.
- Is CVE-2025-47790 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.