CVE-2021-37631
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of data exposure.
- Exploit odds
- 1.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.3% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.3% · EPSS, next 30 days
- Weakness
- CWE-639 · Insecure direct object reference
- Record status
- Modified
Affected
- Nextcloud Deck < 1.2.9
- Nextcloud Deck < 1.4.4
- Nextcloud Deck < 1.5.1
Attack profile CVSS 3.1 · 6.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-37631.md and follow it. Check whether this project is affected by CVE-2021-37631. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/nextcloud/deck/pull/3217
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
- https://github.com/nextcloud/deck/pull/3217
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
References
- https://github.com/nextcloud/deck/pull/3217
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
- https://hackerone.com/reports/1256021
- https://hackerone.com/reports/1280931
- https://github.com/nextcloud/deck/pull/3217
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4mxp-j277-82hr
- https://hackerone.com/reports/1256021
- https://hackerone.com/reports/1280931