CVE-2025-66548
December 05, 2025
Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.12.7, 1.14.4, and 1.15.1, file extension can be spoofed by using RTLO characters, tricking users into download files with a different extension than what is displayed. This vulnerability is fixed in 1.12.7, 1.14.4, and 1.15.1.
Affected Packages
https://github.com/nextcloud/deck.git (GITHUB):
Affected version(s) >=v1.14.0 <v1.14.4Fix Suggestion:
Update to version v1.14.4https://github.com/nextcloud/deck.git (GITHUB):
Affected version(s) >=v1.13.0 <v1.13.4Fix Suggestion:
Update to version v1.13.4https://github.com/nextcloud/deck.git (GITHUB):
Affected version(s) >=v0.1.0 <v1.15.1Fix Suggestion:
Update to version v1.15.1https://github.com/nextcloud/deck.git (GITHUB):
Affected version(s) >=v1.12.0 <v1.12.7Fix Suggestion:
Update to version v1.12.7Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
4.8
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Encoding or Escaping of Output
EPSS
Base Score:
0.01
