3.3Low
CVE-2025-66548Nextcloud Deck app allows to spoof file extensions by using RTLO characters
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.
Weakness (CWE):
CWE-116
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| nextcloud | deck | < 1.12.7 | |
| nextcloud | security-advisories | >= 1.15.0-beta.1, < 1.15.1, >= 1.14.0-beta.1, < 1.14.4, < 1.12.7 |
References and patches
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xjvq-xvr7-xpg6 PatchVendor Advisory
- https://github.com/nextcloud/deck/pull/6671 Issue Tracking
- https://github.com/nextcloud/deck/commit/afa95d3c507465b9d31af7c88c69b76711ef185a Patch
- https://hackerone.com/reports/2326618 Vendor Advisory
CPE matches (NVD) (3)
cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*< 1.12.7cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*≥ 1.14.0 < 1.14.4cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*≥ 1.15.0 < 1.15.1