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CVE-2021-37631 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/nextcloud/deck/pull/3217	CVE	PatchThird Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr	CVE	Third Party Advisory
https://hackerone.com/reports/1256021	CVE	Permissions RequiredThird Party Advisory
https://hackerone.com/reports/1280931	CVE	Permissions RequiredThird Party Advisory
https://github.com/nextcloud/deck/pull/3217	[email protected]	PatchThird Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr	[email protected]	Third Party Advisory
https://hackerone.com/reports/1256021	[email protected]	Permissions RequiredThird Party Advisory
https://hackerone.com/reports/1280931	[email protected]	Permissions RequiredThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]

Affected Products

Product	Versions
nextcloud deck	< 1.2.9 >= 1.3.0, < 1.4.4 >= 1.5.0, < 1.5.1
CPE cpe:2.3:a:nextcloud:deck:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Sep 14, 2021	Initial Analysis	[email protected]