CVE-2023-39952

Advanced permissions not respected when copying entire group folders

CVSS 6.5 MEDIUMEPSS 0.8%CWE-284

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Aug 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

nextcloud · security-advisories

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References

https://github.com/nextcloud/groupfolders/issues/1906 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-cq8w-v4fh-4rjq https://github.com/nextcloud/server/pull/38890 https://hackerone.com/reports/1808079