Vulnerability · Published Aug 10, 2023 · Assigned by GitHub_M
CVE-2023-39952Advanced permissions not respected when copying entire group folders
Medium 6.5
In plain English
A medium-severity improper access control in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Official description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1, a user can access files inside a subfolder of a groupfolder accessible to them, even if advanced permissions would block access to the subfolder. Nextcloud Server versions 25.0.8, 26.0.3, and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13, 23.0.12.8, 24.0.12.4, 25.0.8, 26.0.3, and 27.0.1 contain a patch for this issue. No known workarounds are available.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | >= 22.0.0, < 22.2.10.13>= 23.0.0, < 23.0.12.8>= 24.0.0, < 24.0.12.4>= 25.0.0, < 25.0.8>= 26.0.0, < 26.0.3>= 27.0.0, < 27.0.1 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-cq8w-v4fh-4rjq x_refsource_CONFIRM
- https://github.com/nextcloud/groupfolders/issues/1906 x_refsource_MISC
- https://github.com/nextcloud/server/pull/38890 x_refsource_MISC
- https://hackerone.com/reports/1808079 x_refsource_MISC