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.
References (4)
Core 4
Core References
Third Party Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
Patch, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/deck/pull/3217
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1256021
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1280931
Scores
CVSS v3
6.5
EPSS
0.0029
EPSS Percentile
52.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-639
Status
published
Products (1)
nextcloud/deck
< 1.2.9
Published
Sep 07, 2021
Tracked Since
Feb 18, 2026