CVE-2025-66548

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CVSS 3.1

5.5 medium

EPSS

<1%p5

Published

Dec 5, 2025 (Dec 5, 2025)

Modified

Jun 17, 2026

Description

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.

Vendors: nextcloud
Products: deck
Weakness: CWE-116
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.2%)

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