CVE-2025-66557

low-risk
Published 2025-12-05

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Deck

Affected Vendors

Nextcloud

References (4)

Patch https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95a...
Issue Tracking https://github.com/nextcloud/deck/pull/7131
Patch https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-h...
Issue Tracking https://hackerone.com/reports/3247499
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal