Vulnerability in Nextcloud Deck
CVE-2025-66557
Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission…
EPSS: 0.002 (14.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
Affected products
- Nextcloud Deck
- Nextcloud Security-advisories — versions >= 1.15.0-beta.1, < 1.15.2, < 1.14.6
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-66557?
- CVE-2025-66557 is a medium-severity vulnerability in Nextcloud Deck, classified under Improper Access Control. CVSS score: 5.4/10. Published 2025-12-05.
- How severe is CVE-2025-66557?
- Medium severity. CVSS v3 base score is 5.4 out of 10.