#VU63975 Improper access control in Nextcloud Richdocuments - CVE-2022-31024

Vulnerability identifier: #VU63975

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-31024

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nextcloud Richdocuments
Web applications / Modules and components for CMS

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 attacker can send a federated share and trick a victim to work against a remote Office.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Richdocuments: 4.2.0 - 5.0.3

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External links
https://hackerone.com/reports/1210424
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-94hr-7g4v-f53r
https://github.com/nextcloud/richdocuments/pull/2161

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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