CVE-2025-66548: 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…

PriorityP426medium5.5CVSS 3.1

AVLACLPRNUIRSUCHINAN

EPSS

0.13%

2.6th percentile

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

6 ranges

Vendor	Product	Version range	Fixed in
nextcloud	deck	< 1.12.7	1.12.7
nextcloud	deck	>= 1.14.0 < 1.14.4	1.14.4
nextcloud	deck	>= 1.15.0 < 1.15.1	1.15.1
nextcloud	security-advisories	< 1.12.7	1.12.7
nextcloud	security-advisories	—	—
nextcloud	security-advisories	—	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.