Published: 07/09/2021 Updated: 14/09/2021

CVSS v2 Base Score: 4 | Impact Score: 2.9 | Exploitability Score: 8

CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8

VMScore: 356

Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N

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.

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nextcloud deck

In Nextcloud Deck before version 151, the 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 ...

CWE-639 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 https://nvd.nist.gov https://security.archlinux.org/CVE-2021-37631

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CVE-2021-37631

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