#VU82080 Cleartext storage of sensitive information in Nextcloud Enterprise Server and Nextcloud Server - CVE-2023-45151

Vulnerability identifier: #VU82080

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-45151

CWE-ID: CWE-312

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 potentially sensitive information.

The vulnerability exists due to cleartext storage of sensitive information in the database. A remote administrator can gain access to OAuth2 client_secret.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Enterprise Server: 25.0.0 - 27.0.0

Nextcloud Server: 25.0.0 - 27.0.0

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External links
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9
https://hackerone.com/reports/1994324
https://github.com/nextcloud/server/pull/38398

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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.