CVE-2025-66557
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-05

Last updated on: 2025-12-09

Assigner: GitHub, Inc.

Description
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.

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Meta Information

Published
2025-12-05
Last Modified
2025-12-09
Generated
2026-07-06
AI Q&A
2025-12-05
EPSS Evaluated
2026-07-05
NVD
CVE-2025-66557

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
nextcloud deck From 1.14.0 (inc) to 1.14.6 (exc)
nextcloud deck From 1.15.0 (inc) to 1.15.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-NVD-CWE-noinfo

Attack-Flow Graph

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Executive Summary

This vulnerability in Nextcloud Deck, a kanban style organization tool, is due to a bug in the permission logic prior to versions 1.14.6 and 1.15.2. It allowed users who had the "Can share" permission to modify the permissions of other recipients, which they should not have been able to do. This issue has been fixed in versions 1.14.6 and 1.15.2.

Impact Analysis

The vulnerability can impact you by allowing users with "Can share" permission to escalate their privileges by changing the permissions of other users. This could lead to unauthorized modification of access rights, potentially resulting in unauthorized actions or data manipulation within the Nextcloud Deck environment.

Mitigation Strategies

To mitigate this vulnerability, update Nextcloud Deck to version 1.14.6 or 1.15.2 or later, as these versions contain the fix for the permission logic bug.

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