Home/CVE/Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams inte
CVE

CVE-2021-37631

Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams inte

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.

MEDIUM · CVSS 6.5 EPSS 0.00289
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-639Authorization Bypass Through User-Controlled Key
CWE-639Authorization Bypass Through User-Controlled Key
▤

Affected Products & Versions

3
nextcloud deck< 1.2.9
nextcloud deck>= 1.3.0 and < 1.4.4
nextcloud deck>= 1.5.0 and < 1.5.1
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Sep 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/nextcloud/deck/pull/3217PatchThird Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hrThird Party Advisory
https://hackerone.com/reports/1256021Permissions RequiredThird Party Advisory
https://hackerone.com/reports/1280931Permissions RequiredThird Party Advisory
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