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CVE

CVE-2025-66557

Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integra

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 to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.

MEDIUM · CVSS 5.4 EPSS 0.00019
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

2
nextcloud deck>= 1.14.0 and < 1.14.6
nextcloud deck>= 1.15.0 and < 1.15.2
▣

Scoring & Timeline

5.4
MEDIUM · 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 NVD05 Dec 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

4
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/commit/f1da8b30a455f02373d44154da04494c949a95aePatch
https://github.com/nextcloud/deck/pull/7131Issue TrackingPatch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvvPatchVendor Advisory
https://hackerone.com/reports/3247499Issue TrackingVendor Advisory
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