#VU103055 Improper privilege management in Nextcloud Server and Nextcloud Enterprise Server - CVE-2024-52516

Vulnerability identifier: #VU103055

Vulnerability risk: Low

CVSSv4.0: 0.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-52516

CWE-ID: CWE-269

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 compromise the target system.

The vulnerability exists due to shares are not removed when user is limited to share with in their groups and being removed from one of them. A remote user can gain access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Server: 28.0.0 - 29.0.4

Nextcloud Enterprise Server: 26.0.0 - 29.0.4

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35gc-jc6x-29cm
https://github.com/nextcloud/server/pull/47180
https://github.com/nextcloud/server/commit/142b6e313ffa9d3b950bcd23cb58850d3ae7cf34

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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.