Vulnerability identifier: #VU51051

Vulnerability risk: Low

CVSSv3.1: 4.5 [CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8297

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Deck
Mobile applications / Apps for mobile phones

Vendor: Nextcloud

Description

The vulnerability allows a remote user to compromise the target system.

The vulnerability exists due to insecure direct object reference (IDOR) issue. A remote administrator with a duplicate user identifier can use deck data of a previous deleted user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Deck: 0.1.0 - 1.0.1

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External links
http://github.com/nextcloud/deck/pull/1976
http://hackerone.com/reports/882258
http://nextcloud.com/security/advisory/?id=NC-SA-2021-007

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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.