CVE-2021-39225
8.1 HIGHNextcloud is an open-source, self-hosted productivity platform
Published: 2021-10-25 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 8.1 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CWE
- CWE-639, CWE-862
Affected products
| Vendor | Product |
|---|---|
| nextcloud | deck |
Description
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-39225
- [Patch]https://github.com/nextcloud/deck/pull/3316
- [Other]https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2x96-38qg-3m72
- [Other]https://hackerone.com/reports/1331728
- [Patch]https://github.com/nextcloud/deck/pull/3316
- [Other]https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2x96-38qg-3m72
- [Other]https://hackerone.com/reports/1331728
Related CVEs
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- CVE-2026-45810 — Nextcloud is an open source content collaboration platform (6.8 MEDIUM)
- CVE-2026-45722 — Nextcloud is an open source content collaboration platform (7.1 HIGH)
- CVE-2026-45691 — Nextcloud is an open source content collaboration platform (5.9 MEDIUM)
- CVE-2026-45690 — Nextcloud is an open source content collaboration platform (5.9 MEDIUM)
- CVE-2026-45545 — Nextcloud is an open source content collaboration platform (8.2 HIGH)
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