Home/CVE/Nextcloud is an open-source, self-hosted productivity platform. A missing permission check in Nextcloud Deck before 1.2.
CVE

CVE-2021-39225

Nextcloud is an open-source, self-hosted productivity platform. A missing permission check in Nextcloud Deck before 1.2.

Nextcloud is an open-source, self-hosted productivity platform. A missing permission check in Nextcloud Deck before 1.2.9, 1.4.5 and 1.5.3 allows another authenticated users to access Deck cards of another user. It is recommended that the Nextcloud Deck App is upgraded to 1.2.9, 1.4.5 or 1.5.3.

There are no known workarounds aside from upgrading.

HIGH · CVSS 8.1 EPSS 0.00363
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-639Authorization Bypass Through User-Controlled Key
CWE-862Missing Authorization
▤

Affected Products & Versions

3
nextcloud deck< 1.2.9
nextcloud deck>= 1.3.0 and < 1.4.5
nextcloud deck>= 1.5.0 and < 1.5.3
▣

Scoring & Timeline

8.1
HIGH · 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 NVD25 Oct 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
🔗

References & Sources

3
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/3316PatchThird Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2x96-38qg-3m72Third Party Advisory
https://hackerone.com/reports/1331728Permissions RequiredThird Party Advisory
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