Vulnerability identifier: #VU77661

Vulnerability risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-35928

CWE-ID: CWE-256

Exploitation vector: Network

Exploit availability: No

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

Vendor: Nextcloud

Description

The vulnerability allows a remote user to gain access to other users' credentials.

The vulnerability exists due to user scoped external storage can be used to gather credentials of other users. A remote administrator can get access to the login credentials of another user and take over their account.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Enterprise Server: 19.0.0 - 26.0.1

Nextcloud Server: 25.0.0 - 26.0.1

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External links
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-637g-xp2c-qh5h

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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