#VU103059 Improper access control in Nextcloud Server and Nextcloud Enterprise Server - CVE-2024-52514

Vulnerability identifier: #VU103059

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-52514

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nextcloud Server
Client/Desktop applications / Messaging software
Nextcloud Enterprise Server
Client/Desktop applications / Messaging software

Vendor: Nextcloud

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can copy folder that contain files that are blocked by the files access control.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 27.0.0 - 28.0.4

Nextcloud Enterprise Server: 21.0.0 - 28.0.4

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g8pr-g25r-58xj
https://github.com/nextcloud/server/pull/44889
https://github.com/nextcloud/server/commit/5fffbcfe8650eab75b00e8d188fbc95b0e43f3a8
https://hackerone.com/reports/2447316

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.