Vulnerability identifier: #VU56361

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-37628

CWE-ID: N/A

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 compromise the target system.

The vulnerability exists due to the File Drop features ("Upload Only" public link shares in Nextcloud) can be bypassed. A remote attacker can read arbitrary files in such a share.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nextcloud Richdocuments: 3.8.0 - 4.2.0

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External links
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w/

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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.