CVE-2021-37631 Information

Description

Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. In affected versions the Deck application didn’t properly check membership of users in a Circle. This allowed other users in the instance to gain access to boards that have been shared with a Circle even if the user was not a member of the circle. It is recommended that Nextcloud Deck is upgraded to 1.5.1 1.4.4 or 1.2.9. If you are unable to update it is advised to disable the Deck plugin.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr https://hackerone.com/reports/1256021 https://github.com/nextcloud/deck/pull/3217 https://hackerone.com/reports/1280931

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5