High severity8.1NVD Advisory· Published Aug 10, 2023· Updated Jun 17, 2026
CVE-2023-39963
CVE-2023-39963
Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 20.0.0 and prior to versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a missing password confirmation allowed an attacker, after successfully stealing a session from a logged in user, to create app passwords for the victim. Nextcloud server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 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.
AI Insight
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Affected products
6- Range: >= 20.0.0, < 20.0.14.15
20.0.0 to 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, 27.0.1+ 4 more
- (no CPE)range: 20.0.0 to 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, 27.0.1
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*range: >=20.0.0,<20.0.14.15
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*range: >=25.0.0,<25.0.9
- cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:-:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:enterprise:*:*:*
Patches
Vulnerability mechanics
References
3- github.com/nextcloud/server/pull/39416nvdPatch
- github.com/nextcloud/security-advisories/security/advisories/GHSA-j4qm-5q5x-54m5nvdVendor Advisory
- hackerone.com/reports/2067572nvdThird Party Advisory
News mentions
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