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Medium severity · published Sep 7, 2021
CVE-2021-37631
Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud
6.5
CVSS
1.3%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Deck · Nextcloud
before 1.2.9; 1.3.0 before 1.4.4; 1.5.0 before 1.5.1 · source: NVD
Affected product
DE
Deck
Nextcloud
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-37631
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-37631
Patch
https://github.com/nextcloud/deck/pull/3217
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
Permissions Required
https://hackerone.com/reports/1256021
Permissions Required
https://hackerone.com/reports/1280931
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